says that abiotic factors determine what biotic factors can be in an ecosystem. Jerry
Que tipos de enlaces o puentes de queratina se alteran cuando el cabello se humedece?
When hair gets wet, the hydrogen bonds between keratin molecules in the hair are broken. These bonds are weak and temporary, but they help to maintain the shape and structure of the hair.
Other types of bonds between keratin molecules, such as disulfide bonds and salt bonds, are not typically affected by water. Disulfide bonds are strong and permanent, and they give hair its strength and elasticity. Salt bonds are also relatively strong, and they help to maintain the shape of the hair.
However, both types of bonds can be broken down by chemical treatments, such as hair relaxers or perms. In contrast, the hydrogen bonds broken by water can be re-formed when the hair dries, which is why hair often returns to its original shape after it has been wet.
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The complete question is:
What types of keratin links or bridges are altered when hair gets wet?
Which models the changes in the availability of food energy as energy moves through an ecosystem?
The model that represents the changes in the availability of food energy as energy moves through an ecosystem is called an "energy pyramid" or "trophic pyramid."
This pyramid illustrates the flow of energy through various trophic levels, from primary producers (such as plants) to primary consumers (herbivores), secondary consumers (carnivores), and so on.
As energy moves up the pyramid, only a fraction of it is transferred between levels, leading to a decrease in available energy at higher trophic levels.
The reason for the decrease in available energy can be explained by the second law of thermodynamics, which states that with each energy transfer, some energy is lost as heat.
Additionally, organisms use a significant portion of the energy they obtain for their own metabolic processes, growth, and reproduction. Therefore, only a fraction of the energy from one trophic level is transferred to the next trophic level, resulting in a decrease in available energy at higher levels.
This decrease in available energy at higher trophic levels has important implications for ecosystem dynamics. It limits the number of trophic levels that can be sustained in an ecosystem since there is not enough energy to support a large number of top-level predators.
The energy pyramid helps us understand the structure and functioning of ecosystems and highlights the importance of primary producers in capturing and converting energy from the environment.
It also emphasizes the interdependence of different trophic levels and the flow of energy through the food chain.
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In what step of protein synthesis is the code in mrna then used to make a protein?.
The process of protein synthesis involves the translation of the genetic information stored in mRNA into a sequence of amino acids, which make up a protein. This occurs in the ribosome, a large molecular complex composed of RNA and proteins.
During translation, the ribosome reads the sequence of nucleotides in the mRNA molecule and matches each three-letter codon with the corresponding amino acid. The amino acids are brought to the ribosome by transfer RNA (tRNA) molecules, which have an anticodon that recognizes and binds to the codon on the mRNA.
Once the ribosome has matched the codon with the correct amino acid, it forms a peptide bond between the amino acids, creating a growing chain of amino acids called a polypeptide. This process continues until the ribosome reaches a stop codon, which signals the end of protein synthesis.
In summary, the step of protein synthesis in which the code in mRNA is used to make a protein is called translation, which occurs in the ribosome. During translation, the ribosome matches the codons in mRNA with the appropriate amino acids and forms a polypeptide chain until it reaches a stop codon.
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The absorption process in the kidneys depends on the _____ between the medulla and the filtrate.
A.
uric acid
B.
cortex
C.
concentration gradient
D.
Henle-Koch Postulates
Answer:
B. Cortex
Explanation:
Because the cortex is situated between the medulla and the filtrate in the kidneys, the absorption process is reliant on this area.
Along with the glomerular capillaries, the cortex provides a space where the renal artery and vein's arterioles and venules may perfuse the kidney's nephrons. The renal cortex also produces erythropoietin, a hormone necessary for the creation of the newest red blood cells. Reabsorption of water and sodium chloride from the filtrate is its main characteristic.
What use does Coetex serve?
This helps the organism preserve water while producing extremely concentrated urine: The bulk of the nephron structure is arranged in pyramid-like formations in the inner-most region of the kidney. Renal cortex: The region of the kidney's exterior between the renal tablet and the renal medulla contains blood arteries that connect to the nephrons.
Thus, it is evident that the cortex, which is located between the medulla and the filtrate, is a necessary component of the kidneys' absorption process.
A scientist studies cultures of four different types of cells undergoing cellular respiration and determines the average number of ATP molecules produced per cell, per molecule of glucose consumed. The data was recorded in the table.
Some of the cultures might be of a bacterium, which cannot undergo aerobic respiration. Which cells produce lactic acid as a byproduct of respiration?
A) Cells X and Z
B) Cells W and Y
C) Only Cell Y
D) Only Cell W
B) Cells W and Y cells produce lactic acid as a byproduct of respiration.
The scientist studied four different types of cells undergoing cellular respiration and determined the average number of ATP molecules produced per cell, per molecule of glucose consumed. Cells X and Z produced the highest amounts of ATP, with Cells W and Y producing slightly less.
It is likely that Cells W and Y are producing lactic acid as a byproduct of respiration, since aerobic respiration cannot occur in bacteria. Lactic acid is produced when the cells are unable to use oxygen for respiration and instead use anaerobic respiration, which produces lactic acid as a byproduct. Thus, the cells that produce lactic acid as a byproduct of respiration are Cells W and Y.
Therefore, correct option is B.
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What do animals as diverse as corals and monkeys have in common?.
Animals as diverse as corals and monkeys share several common traits. Firstly, they are all eukaryotic, multicellular organisms. They also belong to the kingdom Animalia and share a common ancestor.
Additionally, they all have specialized cells, tissues, and organs that carry out specific functions in their bodies. For instance, they have a nervous system that helps them respond to their environment and carry out complex behaviors.
They also have specialized digestive, respiratory, and circulatory systems that help them obtain nutrients, oxygen, and remove waste. Furthermore, they all reproduce sexually, which involves the fusion of gametes (sperm and egg cells) to form a zygote.
Despite the differences in their morphology, behavior, and habitat, all animals share these fundamental characteristics.
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In Drosophila, the autosomal recessive brown eye color mutation displays interactions with the X-linked recessive vermilion mutation. Flies homozygous for brown and hemizygous or homozygous for vermilion have white eyes. Predict the F1 and F2 progeny of crossing these true-breeding parents: brown females and vermilion males.
The F1 progeny of the cross will be brown-eyed females heterozygous for both mutations. The F2 progeny will have a 9:3:3:1 phenotypic ratio.
The genuine reproducing guardians are brown-peered toward females (bb) and vermilion-looked at guys (vY). The earthy colored eye variety transformation is autosomal passive, while the vermilion eye variety change is X-connected latent. Consequently, the brown-looked at females are homozygous for the earthy colored transformation (bb) and the vermilion-peered toward guys are hemizygous for the vermilion change (vY).
The cross between these guardians will create F1 descendants that are brown-looked at females that are heterozygous for both the brown and vermilion changes (Bb/vX). The F1 females will get an earthy colored allele from the mother and a wild-type allele from the dad, as well as a wild-type X chromosome from the mother and a vermilion X chromosome from the dad.
At the point when the F1 females are crossed with wild-type guys, the F2 offspring will have a 9:3:3:1 phenotypic proportion. This proportion results from the isolation of the alleles for the two qualities and their communications. In particular, 9/16 of the F2 descendants will have earthy colored eyes and wild-type (red) eyes, 3/16 will have white eyes, 3/16 will have earthy colored eyes and vermilion eyes, and 1/16 will have white eyes and vermilion eyes.
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Which of the following help the lungs to be such good gas exchange organs? (Circle 4 letters).
a) They are close to the heart.
b) They are surrounded by pleural membranes.
c) They have a large surface area.
d) The air in the alveoli and blood in the capillaries are separated by a 2 very thin layers of cells.
e) The blood flows more slowly in the lung capillaries as they are so narrow.
f) The haemoglobin carries lots of oxygen.
g) Breathing constantly changes the air in the alveoli.
h) Active transport increases the rate at which the two gases move.
These factors work together to make the lungs highly effective in their role of gas exchange, allowing for the efficient uptake of oxygen and removal of carbon dioxide from the body. Option (b) ,(c),(g) ang h are correct answer.
The lungs are excellent gas exchange organs due to their unique structure and the various mechanisms that aid in gas exchange. Four key factors that contribute to the effectiveness of the lungs in gas exchange are:
1. Large surface area: The lungs have a large surface area, which provides a greater area for gas exchange to occur.
2. Thin walls: The walls of the lungs are very thin, allowing for rapid diffusion of gases between the air in the lungs and the blood.
3. Moist environment: The lungs are moist, which helps to dissolve gases, making them easier to exchange.
4. Active transport: Active transport mechanisms help to increase the rate at which gases move across the walls of the lungs, ensuring efficient exchange of oxygen and carbon dioxide.
Therefore, Option (b) ,(c),(g) ang h are correct answer.
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Baraka and his dark-skinned wife who had an albino father mother’s genotype:
father’s genotype:
offspring genotype %:
offspring phenotype %:
His fathers genotype is 75% genotype and 25% phenotype.
Based on the information given, we know that Baraka and his dark-skinned wife had a child with an albino father. To determine the possible genotypes and phenotypes of their offspring, we need to first consider the genotypes of the parents.
Assuming that the dark-skinned wife is homozygous for the dominant allele for skin color (let's call it "D") and the albino father is homozygous recessive for the same gene (dd), we can write out their genotypes as follows:
Mother: DD
Father: dd
When these two parents have children, each parent will randomly pass down one of their two alleles to their offspring. Using a Punnett square, we can determine the possible genotypes and phenotypes of their offspring:
| | D | D |
|---|---|---|
| d | Dd | Dd |
| d | Dd | Dd |
From this Punnett square, we can see that all of their offspring will be heterozygous for skin color (Dd), meaning they will have one dominant allele for dark skin and one recessive allele for albinism.
To determine the percentage of offspring with each genotype and phenotype, we can count the number of squares in the Punnett square that correspond to each possibility:
- Genotypes:
- DD: 0/4 or 0%
- Dd: 4/4 or 100%
- dd: 0/4 or 0%
- Phenotypes:
- Dark-skinned: 3/4 or 75%
- Albino: 1/4 or 25%
Therefore, we can say that all of Baraka and his wife's offspring will be carriers for albinism (heterozygous for the gene), and 75% of their offspring will have dark skin while 25% will be albino.
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Blank are blank , which contain the information for building blank?
Answer:
Chromosomes, DNA, proteins
Explanation:
PLS HELPP!! super easy
Which population growth pattern is most likely if a population is exposed to a new predator?
Responses
exponential
decreasing
slow growing
stable
Answer: B Decreasing
Explanation:
The most likely population growth pattern if a population is exposed to a new predator is decreasing. The predator will eat the prey, reducing the population size. The population may eventually reach a stable level if the predator population also reaches a stable level. However, if the predator population continues to grow, the prey population will continue to decline.
The other options are not as likely. An exponential growth pattern is only possible if the population is not limited by resources. A slow-growing pattern is possible if the population is limited by resources, but the predator is not a significant factor. A stable population is possible if it is in equilibrium with its environment, including the predator.
Answer: decreasing
Explanation: took the quiz and it was right. :)
How are a 10-gram sample of solid gold and a 50-gram sample of solid gold different?
Answer: the different thing about eachother is that one will have more and weight more than the other
Explanation:
List the steps of ecological succesion of an abandoned wheat dield
The ecological succession of an abandoned wheat field typically involves several stages, including pioneer species colonization, intermediate succession, and climax community formation.
Pioneer species colonization: The first organisms to colonize the abandoned wheat field are typically hardy, fast-growing plants such as grasses and weeds. These plants are adapted to harsh conditions such as poor soil quality and lack of water.
Intermediate succession: Over time, as the pioneer species die off and decompose, they create soil that is richer in nutrients. This allows for the growth of larger plants, such as shrubs and small trees. These plants may also attract pollinators and herbivores.
Climax community formation: Finally, after several decades, a stable, diverse ecosystem called a climax community may form. This community consists of a variety of plants and animals that are well-adapted to the environmental conditions of the area.
In the case of an abandoned wheat field, the climax community may consist of trees such as oak or pine, as well as various species of animals such as birds, insects, and mammals.
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Mitosis occurs in cells.
Answer:
Yes.
Explanation:
Mitosis occurs in somatic cells; this means that it takes place in all types of cells that are not involved in the production of gametes.
What are the four main functions of a skeleton? ANSWER PLEASE, WILL GIVE BRAINLIEST!!!!!!, ASAP ASAP PLSSSSSSSSSSSSSSSS
Answer:
support, production of blood cells, storage of ions, and endocrine regulation.
Your body is supported by your skeleton, which also holds your internal organs in place. The body would be floppy, like a jellyfish, without bones. Your muscles and organs have a framework to connect, thanks to your bones. The vertebral column (backbone) is what keeps your body upright.
Because bones are strong and hard, they can protect vital internal organs from harm. For example:
Your skull protects your brain.Your rib cage protects your heart and lungs.Your backbone protects your spinal cord.MoveBones are attached to muscles. A bone will move as a result of a muscle pulling on it. The skeleton is flexible at joints like your knee. The body may move because of how bones move around joints.
Your body has some hollow bones, such as the long ones in your arms and legs. A soft tissue called bone marrow is located in the middle of these bones. Red and white blood cells are created in the bone marrow. White blood cells are used to fight infection, whereas red blood cells are used to transport oxygen throughout the body.
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Fun Fact2 to 3 million red blood cells are produced each second by the bone marrow!The adult human body has 206 bones!The femur is the longest and strongest bone of the human skeleton!Key vocabulary for science newtons laws newton (n) - the ____ for the ______ of ______ an object contains.
Key vocabulary for science - Newton's Laws
Newton (N) - the unit for the force of motion an object contains.
The Newton (N) is the standard unit of measurement for force in the International System of Units (SI). It is named after Sir Isaac Newton, who developed the three laws of motion that are the basis of classical mechanics.
The first law, also known as the law of inertia, states that an object at rest will remain at rest, and an object in motion will continue to move in a straight line with a constant velocity, unless acted upon by a net external force.
The second law states that the acceleration of an object is directly proportional to the net force acting on the object and inversely proportional to its mass.
The third law states that for every action, there is an equal and opposite reaction.
The Newton is used to measure a wide range of forces, including gravitational forces, frictional forces, and the forces involved in collisions and explosions.
Understanding the concept of force and its measurement is essential in studying and analyzing the physical world around us.
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In three to five sentences, explain how the fossil record provides evidence for the idea of natural selection.
please help. my mother dint want me to learn about human evouloution and i need help for answerss on the test
The fossil record provides evidence for the idea of natural selection by showcasing the changes in species over time. It reveals the existence of transitional fossils, which are intermediate forms between ancestral species and their descendants. This demonstrates how species adapt to their environment through the process of natural selection, leading to the development of new traits and the eventual evolution of new species.
The fossil record provides evidence for the idea of natural selection by documenting changes in the traits of organisms over time. As new species evolve and old species become extinct, the fossil record preserves a record of the morphological, anatomical, and behavioral changes that have occurred in populations over time. By examining the patterns of these changes, scientists can infer the selective pressures that may have led to the evolution of these traits, such as changes in environmental conditions or the emergence of new predators or competitors. These observations provide strong evidence that natural selection is a major driver of evolutionary change in organisms.Learn more about natural selection:
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discuss two ways social media benefits learners when completing assessment tasks.
Social media can benefit learners when completing assessment tasks in various ways.
Firstly, it provides a platform for students to collaborate and share ideas, which can lead to a deeper understanding of the subject matter.
Secondly, social media can also provide learners with quick access to a wide range of resources and information.
Through social media, learners can connect with their peers, form study groups, and share resources, all of which can contribute to a more holistic and collaborative approach to learning.
By following relevant experts, organizations, or hashtags on social media, students can stay up-to-date on the latest research, news, and trends in their field of study.
This can help them to better understand complex concepts and theories, and can also provide inspiration and motivation for completing assessment tasks.
Additionally, social media can be used to connect with professionals in a given field, providing opportunities for mentorship and guidance.
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The next day, the temperature decreased enough for both samples to experience a phase change. Actively read the prompt and the questions. Use your understanding about phase change too explain your answers to the questions.
A phase change occurs when a substance changes from one state of matter to another. In this case, the temperature decreased enough for both samples to experience a phase change.
The two samples could have gone from either a solid to a liquid (melting) or from a liquid to a solid (freezing). Depending on the material, the temperature at which they experience a phase change can differ. The lower the temperature, the more likely a sample will experience a phase change as it approaches its melting or freezing point.
The two samples could also have gone from a gas to a liquid (condensation) or from a liquid to a gas (evaporation). Condensation occurs when a gas becomes a liquid due to the cooling of the air, while evaporation occurs when a liquid becomes a gas due to the heating of the air.
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The basic characteristics that differentiate living from non-living things are called
The basic characteristics that differentiate living from non-living things are called life, growth, and reproduction.
More about the differentiation between living and non-living thingsAll living things have senses, breathe, eat, grow, move, and reproduce. Non-living things do not consume food, grow, breathe, move, or reproduce. They have no senses.
Also, Non-living entities do not give birth. They do not mature, reproduce, age, or die. Non-living items can be both natural and artificial.
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Why couldnt we test density of water and alcohol in their solid state
We cannot test the density of water and alcohol in their solid state because: they do not have a defined solid form.
Both water and alcohol have a unique property known as anomalous expansion, where they expand when cooled below a certain temperature, resulting in a decrease in density.
This is because the molecules in the liquid state are more tightly packed than they are in the solid state. As a result, water and alcohol both form less dense ice when they freeze.
Attempting to measure the density of water and alcohol in their solid state would be difficult as they do not have a defined shape and can have different densities based on how they freeze.
Water can form various types of ice, such as hexagonal ice or cubic ice, which can have different densities. Similarly, alcohol can also have different solid forms, resulting in different densities.
Therefore, to accurately measure the density of water and alcohol, it is necessary to measure them in their liquid state.
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Did you notice any trends between temperature and weather conditions in mark's data? were certain types of weather associated with higher or lower temperatures?
Yes, there were certain trends between temperature and weather conditions in Mark's data. Generally, it seemed that areas with sunny weather had higher temperatures.
For example, when Mark's data showed temperatures of around 90°F, the weather was sunny. In contrast, when the temperatures dropped to around 50°F, the weather was cloudy. Additionally, areas with high humidity also had higher temperatures. For instance, when the humidity was high, temperatures were around 80°F.
The opposite was true when humidity levels were low; in these cases, the temperatures were around 50°F. All in all, Mark's data showed a correlation between temperature and weather conditions, with sunny and humid weather associated with higher temperatures.
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What is the function of cyclin and cdk? what would happen if they become damaged?
The function of cyclin and CDK (Cyclin-Dependent Kinase) is to regulate the cell cycle progression.
Cyclin is a protein that binds to CDK, which is a kinase enzyme. When cyclin binds to CDK, it activates the CDK, which in turn phosphorylates target proteins involved in cell cycle progression. This ensures that the cell moves through the different stages of the cell cycle (G1, S, G2, and M phases) in an orderly manner.
If cyclin and CDK become damaged, it could lead to uncontrolled cell growth or cell cycle arrest. Damaged cyclin and CDK might not be able to function properly, which could result in the inability to phosphorylate target proteins. This could cause the cell to either become stuck in a certain stage of the cell cycle or move through the stages without proper regulation. Ultimately, this can lead to the formation of tumors, as cells could start to divide uncontrollably, or cell death if the cell cannot progress through the cell cycle.
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ca2 is an intracellular messenger involved in which of these processes? choose one or more: triggering of embryonic development after fertilization nerve cell depolarization initiation of muscle contraction secretion of hormones release of neurotransmitters
Ca2 is an intracellular messenger involved in which of these processes initiation of muscle contraction therefore the correct option is C.
An intracellular messenger is a molecule that transmits information within a cell. It can be used to send signals from the extracellular environment to the inside of the cell or among components within the cell itself. Examples of intracellular messengers include cyclic-AMP, calcium ions, hormones, cytokines and growth factors.
These molecules bind to specific receptors on the target cells to elicit a response through a variety of pathways. The intracellular messenger then has an effect on gene expression, protein synthesis, enzyme activity and other biological processes.
Hence the correct option is C.
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In the progression from smaller to larger components of the lymphatic pathway, the lymphatic _________ , join one of two collecting ________
In the progression from smaller to larger components of the lymphatic pathway, the lymphatic vessels, join one of two collecting ducts.
The lymphatic system is crucial for maintaining fluid balance and supporting immune functions within the body. Starting with the smallest components, the lymphatic capillaries are responsible for collecting interstitial fluid that has escaped from blood capillaries. As the fluid moves through these tiny vessels, it becomes known as lymph, the lymphatic capillaries merge into larger lymphatic vessels, which contain valves that prevent the backflow of lymph. These larger vessels transport lymph through a network of lymph nodes, where it is filtered, and immune cells monitor for any potential threats such as pathogens or foreign particles.
Ultimately, the lymphatic vessels join one of two collecting ducts: the right lymphatic duct or the thoracic duct. The right lymphatic duct serves the upper right quadrant of the body, while the thoracic duct drains lymph from the rest of the body. These two ducts empty the filtered lymph back into the circulatory system at the junction of the internal jugular and subclavian veins. In summary, the lymphatic pathway consists of a hierarchical structure where lymphatic vessels merge into larger collecting ducts, ensuring efficient fluid balance and immune system support.
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About how much oxygen is produced by the amazon rainforest alone?.
The Amazon rainforest is estimated to produce about 20% of the world's oxygen, which is equivalent to approximately 6 to 9 billion tons of oxygen per year. This is because the rainforest's vegetation is able to photosynthesize and convert carbon dioxide into oxygen at high rates.
However, it is important to note that the oxygen produced by the rainforest is not solely used by humans, as it is also used by other organisms within the rainforest ecosystem.
Trees and other plants in the rainforest produce oxygen through the process of photosynthesis, which involves using sunlight, carbon dioxide, and water to produce oxygen and sugars.
The Amazon rainforest, which spans over 6.7 million square kilometers, produces about 20% of the world's oxygen. This amounts to approximately 20 billion metric tons of oxygen per year, which is critical for the survival of humans and other living organisms on Earth.
The Amazon rainforest also plays a crucial role in regulating the Earth's climate by absorbing and storing large amounts of carbon dioxide.
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In muscle cells, myosin molecules continue moving along actin molecules as long as.
In muscle cells, myosin molecules continue moving along actin molecules as long as (d) ATP is present and the intracellular Ca²⁺ concentration is high.
In muscle cells, myosin and actin filaments slide past each other during contraction, resulting in muscle shortening. This process is initiated by the release of calcium ions (Ca²⁺) from the sarcoplasmic reticulum, which binds to troponin and causes tropomyosin to move away from the myosin-binding sites on actin.
Once the binding sites are exposed, myosin heads bind to actin, forming cross-bridges. The hydrolysis of ATP provides the energy for the myosin heads to pull the actin filament, causing it to slide past the myosin filament. As long as ATP is present and the intracellular Ca²⁺ concentration is high, myosin continues to move along actin, resulting in sustained muscle contraction.
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Complete question :
In muscle cells, myosin molecules continue moving along actin molecules as long as
a. ATP is present and troponin is not bound to Ca²⁺.
b. ADP is present and tropomyosin is released from intracellular stores.
c. ADP is present and the intracellular acetylcholine level is high.
d. ATP is present and the intracellular Ca²⁺ concentration is high
genotypes are the combitaion of alleles that determine traits
Answer:
True
Explanation:
Genotypes refer to the genetic makeup of an organism, which is determined by the combination of alleles inherited from its parents.
Alleles are different versions of the same gene, and they can either be dominant or recessive. The genotype of an individual determines the traits or characteristics it will display.
For example, if an individual has two dominant alleles for brown eyes (BB), it will have brown eyes, while an individual with one dominant and one recessive allele (Bb) will also have brown eyes, as the dominant allele masks the recessive one.
On the other hand, an individual with two recessive alleles (bb) will have blue eyes, as the recessive allele is expressed.
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40 points for this question!
Answer:
4mol because in equation it is written.
Organisms use different methods to obtain energy that they need to perform life functions. Which of the following can be an autotroph or a heterotroph?
A. bacteria and fungi
B. fungi and viruses
C. bacteria and protists
D. fungi and protists
The organisms that can be an autotroph or a heterotroph are bacteria and protists (option C).
What are autotroph and heterotrophs?Autotroph is any organism that can synthesize its food from inorganic substances, using heat or light as a source of energy.
On the other hand, a heterotroph is an organism which requires an external supply of energy in the form of food as it cannot synthesize its own.
Protists are living organisms that belong to the kingdom Protista, which can either be autotrophic like green algae or heterotrophic like amoeba.
Also, certain bacteria like blue green algae are autotrophic while Pseudomonas is an example of heterotrophic bacterium
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