Answer:
A cell wall is a structural layer surrounding some types of cells, just outside the cell membrane. It can be tough, flexible, and sometimes rigid. It provides the cell with both structural support and protection, and also acts as a filtering mechanism.
Explanation:
A cell wall is a rigid, semi-permeable protective layer in some cell types. This outer covering is positioned next to the cell membrane (plasma membrane) in most plant cells, fungi, bacteria, algae, and some archaea.
Amaya collected insects in the forest. she was unable to identify one unusual looking insect using a dichotomous key. amaya concluded that the insect must be a new species. which facts would support the conclusion that the insect is a new species? the insect cannot be identified based on one of the first three questions. the way the insect was collected may have caused damage to its exoskeleton and wings. several other thorough and up-to-date dichotomous keys also failed to identify the insect. the normal diet of many insects in the forest has been seriously altered by a recent drought.
The dichotomous key is a tool to identify organisms based on the observable traits. As Amaya collect insect and not able to identify means several other up-to-date dichotomous keys failed to identify them.
What is dichotomous keys ?Classification helps in identification of different organisms. Dichotomous keys plays an important role in this.
It helps to identify and classify organisms on the basis of their characteristics.
It is the most common type of identification key used. When creating this key, both qualitative factors and quantitative factors are kept in mind.
As Amaya's collected insect is not identified by dichotomous key, she considered it as a new species, it can be said that several other thorough and up-to-date dichotomous keys also failed to identify the insect.
Thus, the correct option is C.
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Answer:
The dichotomous key is a tool to identify organisms based on the observable traits. As Amaya collect insect and not able to identify means several other up-to-date dichotomous keys failed to identify them.
What is dichotomous keys ?
Classification helps in identification of different organisms. Dichotomous keys plays an important role in this.
It helps to identify and classify organisms on the basis of their characteristics.
It is the most common type of identification key used. When creating this key, both qualitative factors and quantitative factors are kept in mind.
As Amaya's collected insect is not identified by dichotomous key, she considered it as a new species, it can be said that several other thorough and up-to-date dichotomous keys also failed to identify the insect.
Thus, the correct option is C.
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Explanation:
cuxz
which pair of structures would provide a positive identification of a plant cell under a microscope?
A. Cell wall, mitochondria
B. Ribosomes, chloroplasts
C. Plasma membrane, large central vacuole
D. Cell wall, chloroplasts
Explanation:
1. The plant cells differ with the animal cells with respect to some points.
2. Firstly, the presence of cell walls are exclusive for plants and totally absent in animals.
3. Secondly, the presence of chloroplasts or plastids is exclusive for plants.
4. Thirdly, vacuoles are huge in plant cells, but smaller in animals. They give extra support to each cells for standing, and also to store several excretory products.
Answer is-D. Cell wall, chloroplasts
Wether a horse is a tame animal or not?
Answer:
uhhhh it just depends
Explanation:
Please help!!! I need help with this question
Answer:
The answer is C. Hope this helped you out!
Given below are some characteristics of invertebrates.
a. Shell made of calcium carbonate
b. Jointed legs
c. Spiny body covering
d. Two-layered body (diploblastic) e.Chitinous exoskeleton
(i) Out of above what are the characteristics shown by grasshoppers?
somone please answer
In what order do the changes in the succession of an ecosystem occur?
An example of succession is a landslide is produced, then lichens grow, this leads to the accumulation of thin soil, which finally leads to a mature community.
What is succession?Succession is an ecological process associated with the renewal of the ecosystem after a disturbance.
The process of succession is fundamental for reaching the homeostasis (internal equilibrium) of the ecosystem.
The succession may involve the emergence of new species in the ecosystem after disturbance.
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Constrictions in the vocal tract will raise or lower the formant frequency. How is the first formant frequency, which is also known as F1, lowered
The formant frequency can be lowered by raising the height of the tongue
What is formant frequency?Formant frequency refers to the resonant frequencies of sound signals which are produced during speech, playing of musical instruments or when singing.
The first formant frequency is known as F1.
Movements of the vocal tract will raise or lower the formant frequency through constrictions of the vocal tract as well as movement of the tongue.
The formant frequency, which is also known as F1 can be lowered by raising the height of the tongue.
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What changes must humans make to protect the environment
Answer:
According to climate experts, it is urgent to fight the growth of the greenhouse effect, which, by contributing to the excessive warming of the planet, threatens its ecological balance. From the reduction of fossil fuel consumption to the geological storage of CO2, many solutions are envisaged to preserve a balance threatened by increasing industrialization and the development of transport.
Reducing CO2 emissions requires simultaneous action on several fronts: controlling energy demand, improving energy efficiency during production and conversion of fossil fuels, replacing fossil fuels with energy containing less or carbon and the establishment of a market for tradable CO2 emissions permits.
A new way to fight greenhouse gases is the capture of these gases from its source of production and its storage in the underground, appears as a promising solution to face the risk of climate change. Major scientific breakthroughs are expected in this area.
Explanation:
Why is it that mutations to
body cells do not affect offspring?
Answer:
Since all cells in our body contain DNA
Explanation:
Since all cells in our body contain DNA, there are lots of places for mutations to occur; however, some mutations cannot be passed on to offspring and do not matter for evolution. Somatic mutations occur in non-reproductive cells and won’t be passed onto offspring. Its seeds will not carry the mutation. Somatic cells give rise to all non-germline tissues. Mutations in somatic cells are called somatic mutations. Because they do not occur in cells that give rise to gametes, the mutation is not passed along to the next generation by s means.
Which of the following is an example of a favorable mutation
A) A mutation that gives a lizard an extra leg
B) A mutation that causes a bird's eye color to change
C) A mutation that causes a snow rabbit to have black fur
D) A mutation that causes a flower be more brightly colored
Answer:
D
Explanation:
insects are more attracted to brighter colored flowers
Which layer of the meninges surrounding the brain resembles a spider web?.
Answer:
The middle layer of meninges is arachnoid, which resembles a cobweb in appearance, is a thin layer with numerous threadlike strands that attach it to the innermost layer. The space under the arachnoid, the subarachnoid space, is filled with cerebrospinal fluid and contains blood vessels
Explanation:
All the offspring of a cross between a black-eyed fly and an orange-eyed fly have black eyes. This means that the allele for black eyes is _________ the allele for orange eyes.
You determine that a victim is unresponsive but breathing. While waiting with the victim for EMS personnel, you would position the victim:_______.
Answer:
You would put the victim in the recovery position
Explanation:
The recovery position is a position in which the victim is laying on their side.
You determine that a victim is unresponsive but breathing. While waiting with the victim for EMS personnel, you would position the victim in the recovery position.
They benefit from having their head in this posture with their airway open. Their tongue will slip forward, allowing blood and vomit to pour out. It is referred to as the "recovery position" at times.
The recovery posture will keep someone's airway open and clean. It also makes sure that they won't choke on any liquids or vomit.
The recovery posture will keep someone's airway open and clean. It also makes sure that they won't choke on any liquids or vomit.
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True or false? the driving force for the unloading of oxygen from hemoglobin into tissues is the difference in pco2 levels between the blood and body tissues.
Answer:
False. The driving for is the partial pressure gradient of O2 (PO2 difference), not the PCO2 gradient.
However, keep in mind that an increase in PCO2 can facilitate the unbinding of oxygen from hemoglobin. This is due to a decrease in pH associated with PCO2 increase. The H+ ions bind to hemoglobin and decrease it's affinity for oxygen, this is called the bohr effect. But the PCO2 is not the main driving force of oxygen unbinding.
(a) Identify both the cellular component and the location of the component that is responsible for producing the luciferase protein from mRNAs transcribed in the plasmid-containing T lymphocytes. Explain what dictates to the lymphocytes the correct order in which amino acids should be linked to form the luciferase protein.
(b) Identify the independent variable in the experiment described. Identify the plasmid that was used as a negative control for luciferase activity. Justify including the plasmid with the non-CD3γ active promoter in the experiments.
(c) Identify the plasmid that must contain the CD3γ core promoter sequence but the fewest or no negative regulatory sequences. Based on the data in Figure 2, describe the most likely cause of the variation in luciferase activity among the cells that contain plasmids pCD3γ-419, pCD3γ-309, pCD3γ-239, and pCD3γ-199. Calculate the approximate percent increase in luciferase activity between cells containing plasmid pCD3γ-59 and cells containing plasmid pCD3γ-149. Round to the nearest whole number.
(d) Predict the most likely observed level of luciferase activity if plasmid pCDγ3-789 is introduced into nonlymphoid cells such as a line of kidney tissue cells. Provide reasoning to justify your prediction.
Ribosomes are the organelles that is resposnible for the production of luciferase.
Where luciferase is produced?Luciferase is produced by ribosomes in the cytoplasm of the cell or in the cytosol of the lymphocytes. This indicates the sequence of nucleotides in the messager RNA gives message to the amino acid sequence of luciferase.
So we can conclude that ribosomes are the organelles that is resposnible for the production of luciferase.
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i need help please i really don´t know
Answer:
It's B
Explanation:
I just looked up the answer.
Hope it helps.
the moon has a stronger influence on earths tides than the sun because the moon— a. is denser than the sun b. has more mass than the sun c. is much closer to earth d. moves much faster relative to earth
Answer: The correct answer would be C. Hope this helps!
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If an organism normally has 34 chromosomes, how many molecules of dna should there be in the g1 phase of the cell cycle?.
Answer:
12 DNA molecules in G1.
Explanation:
What are the minimal components needed for a virion?.
Answer:
The minimal components needed for a virion are capsid and genome.
Explanation:
The virions consist of a nucleic acid core that constitutes the genome, along with a surrounding protein shell, which is the capsid.
Hope this helps! Have an awesome day! :D
Which type of invasive species is more successful at outcompeting native species?
O Specialist species
O Generalist species
Or-selected species
O K-selected species
The type of invasive species is more successful at outcompeting native species is option C: r-selected species.
What gives these invasive species their success?Because they can reproduce and expand quickly or because their new environment is devoid of any natural predators or pests, invasive species are frequently successful in their new ecosystems. Therefore, invasive species have the potential to endanger native species and interfere with crucial ecosystem processes.
Therefore, The majority of invasive species are chosen because they have a high capacity for reproduction and develop rapidly. They can quickly colonize new areas as a result, and they may even outcompete local specialist species.
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The water cycle is an important part of how Earth supports life. During the water cycle, water passes through many different kinds of plants, animals, and soil organisms. In many of these steps, the water is cleaned and made safe for humans to drink. What would most likely happen to the drinking water if the level of biodiversity in an ecosystem decreased?
A- The water would be less clean because there would be fewer kinds of organisms to clean it.
B-There would be more water because it would be passing through many different kinds of species.
C-The water would be more clean because there would be fewer kinds of organisms to clean it.
D-There would be less water because it would be passing through many different kinds of species.
Answer:b?
Explanation:
Answer:
A The water would be less clean because there would be fewer kinds of organisms to clean it.
Explanation:
Where does fertilization occur in the female reproductive tract?.
Answer:
The Fallopian Tube
What elements are needed to carry out photosynthesis? Select all that apply.
water
solar energy
oxygen
carbon dioxide
glucose
carbohydrates
Answer:
Water, Solar energy, and Carbon Dioxide.
Explanation:
The overalll reaction of photosynthesis is 6CO2 + 6 H2O -> C6H12O6 (Glucose) + 6O2. This reaction is driven by energy in the form of electromagnetic radiation (light).
As we can see we need CO2, H2O, and light as reactants. And oxygen + glucose (carbohydrates) are our products.
What is different about the way molecules move in gases?
Answer: Below
Explanation:
The states of matter are related to the speed of molecules. Slow molecules become solid because there are less energy/heat in them, therefore less speed. Since they have less energy in them, the molecules are more bunched up. The term absolute zero is when molecules are at a complete stop. Solids are slow, therefore condensed. Liquids are medium, and can flow, while gases are fast and disperse fairly easily.
Jody notices a trend in the information in the table. the trend that she sees suggests that question 2 options: warm-blooded animals usually need to learn how to swim. animals born in water usually need to learn how to swim. warm-blooded animals usually know how to swim instinctively. animals born on land usually need to learn how to swim.
Since they lack adaptations for life in water, animals born on land usually need to learn how to swim.
Why are adaptations?Adaptations are special features and modifications in structure of an organism which helps the organism to be better suited to survive and reproduce in its environment.
All organisms have features that help them survive in their environment.
Land organisms usually have feet to walk on land.
Aquatic organisms have parts that help them swim in water.
Therefore, based on adaptations to their habitat, animals born on land usually need to learn how to swim.
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Important applications of polymerase chain reaction (PCR) include the following with the general exception of: ________
Answer:
The answer would be search for mutations with large deletions.
Explanation:
The reason why is becasuse what Polymerase Chain Reaction (PCR) does is amplify specific regions of DNA. PCR often is used to test for viruses like SARS-CoV-2 along with other infectious diseases.
Hope this helps.
The mechanism of stabilizing the gfr based on the tendency of smooth muscle to contract when stretched is known as __________.
Answer: Increased blood volume and increased blood pressure will increase GFR. Constriction in the afferent arterioles going into the glomerulus and dilation of the efferent arterioles coming out of the glomerulus will decrease GFR. Hydrostatic pressure in the Bowman's capsule will work to decrease GFR
Explanation:
When homologous chromosomes cross over, what is the result?.
Answer:
a hybrid chromosome with a unique pattern of genetic material
Explanation:
hope this helps
pls mark brainliest
By rotating their crops, farmers can significantly reduce the amount of pesticides necessary to
protect them from harmful insects. One farmer decides that using additional pesticides instead of
rotating crops would make things easier.
Select one or more:
a. sediment
b. toxic
O c. nutrient
O d. bacterial
A farmer using additional pesticides instead of rotating crops would make things more toxic for the plant and the environment
What is crop rotation?Crop rotation is a system of cropping in which different crops are planted on a particular piece of land every planting season.
Crop rotation helps to reduce the use of pesticides which are toxic to the environment.
Therefore, the farmer using additional pesticides instead of rotating crops would make things more toxic for the plant and the environment.
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In seed-bearing plants, what structure becomes the seed following fertilization?.
The ovule becomes the seed.