Increased environmental disturbances from human activities and altered bird habitats are the main reason behind the extinction of bird species between 1901-2000.
Between 1901 and 2000, 90 more mammal species went extinct than between 1801 and 1900. Environmental issues caused by human activities have gotten worse Changes in bird habitats between 1901 and 2000 was the main factor in the demise of numerous bird species.
When something is eradicated, it ceases to exist. There could be a lot of reasons for it, such as the extinction of some species as a result of overhunting, a lack of food, or natural disasters.
The mass extinction, which has only occurred five times throughout history, comes first. There are essentially two types of extinction. The second factor is background extinctions, which occur over a longer period of time and have a considerable impact on the pace of natural extinction.
The complete question is:
Which of the following is the most likely reason that the greatest number of extinctions of bird species occurred in the period 1901-2000?
(a). Increased environmental disturbances from human activities altered bird habitats.
(b). Deforestation
(c). Creating wildlife refugees
(d). species richness
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Why are most point mutations harmless?
Most point mutations are harmless because the majority of the genetic code is non-coding, meaning that it does not contain instructions for making proteins.
Point mutations that occur in non-coding regions of the DNA will not affect the function of the proteins that are produced, and therefore, will not cause any harm.
Additionally, point mutations that occur in coding regions can sometimes result in a change in the amino acid sequence of a protein, but the change may not be significant enough to alter the protein's function. For example, a point mutation that changes one amino acid in a protein's sequence may not disrupt the protein's structure or function. This is known as a silent mutation.
Furthermore, some point mutations can even be beneficial by providing a selective advantage. For example, a point mutation that changes a codon for an amino acid to one that codes for a different amino acid but still allows the protein to function properly.
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What do mitochondria make?
Answer:
It produces energy for the cell. That energy is called ATP or adenosine triphosphate
Explanation:
Answer:
Mitochondria are membrane bound cell organelles mitochondrion singular that generate most of the chemical energy needed to power the cell's biochemical reactions Chemical energy produced by the mitochondria is stored in a small molecule called adenosine triphosphate ATP
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What happens to a plant cell during cellular respiration?
The cell rests
The cell absorbs water
O The cell releases oxygen
The cell releases stored energy
Answer:
releases energy
Explanation:
Answer:
The cell releases oxygen The cell releases stored energy
Explanation:
During cellular respiration, the mitochondria take in carbon dioxide and purify it back into oxygen. Huamns also have this process, but in a much smaller manner. This process is what gives us oxygen on our planet.
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2. Is Gause’s Principle accurate? Explain why or why not.
Yes, the Gause’s Principle is accurate and applicable in real life.
What is Gause's principle?This law is also known as Gause's law. One resident will drive off the other one. If any of the life forms of the exhaust population remains, that would be because they have modified themselves according to the dissimilar niches.
Gause's laboratory experiment showed the process of competitive exclusion because he was able to separate the two species /living organisms and their common limiting resource such as food that is present in the laboratory.
Gause's principle of ruthless exclusion states that two species competing for the same restricted resource cannot coexist in the same niche forever. In ecology, the competitive exclusion principle, sometimes mention as Gause's law is a proposition.
So we conclude that The competitive barring principle, which is also known as Gause's law of competitive exclusion.
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Of the following routes of administration, which will produce the fastest onset of effects? O Intramuscular injection. O Inhalation. O Using a rectal suppository. O Rubbing it on the head.
Intravenous injection is the most effective approach for quickly and accurately distributing a certain amount throughout the body. It is also used for irritating solutions that would cause pain and tissue damage if supplied by subcutaneous or intramuscular injection.
Intravenous therapy (IV therapy) is a medical practice that involves injecting fluids, medicines, and nutrients directly into a patient's vein. Intravenous administration is extensively used for rehydration or to provide nutrients to people who are unable or unwilling to swallow food or drink by mouth due to reduced mental states or other causes.
It can also be used to administer medications or other types of medical therapy, such as blood products or electrolytes, to balance electrolytes. Attempts to administer intravenous therapy date back to the 1400s, but the practice did not become widespread until the 1900s, after protocols for safe and successful use were developed.
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A thoracentesis specimen was collected and sent to the laboratory for testing. What body area was this specimen collected
The body area where this specimen was collected is thorax when a thoracentesis specimen was collected and sent to the laboratory for testing.
The thorax is the place among the stomach inferiorly and the foundation of the neck superiorly. It paperwork from the thoracic wall, its superficial structures (breast, muscles, and skin) and the thoracic cavity. The location of the frame among the neck and the stomach. The thorax carries important organs, inclusive of the heart, fundamental blood vessels, and lungs. It is supported through the ribs, breastbone, and spine. A skinny muscle referred to as the diaphragm separates the thorax from the stomach. It gives a base for the muscle attachment of the higher extremities, the pinnacle and neck, the vertebral column, and the pelvis. The thorax additionally gives safety for the heart, lungs, and viscera.
Thus, the body area is known as thorax.
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What are the factors that affect genetic variation with examples?
The factors that affect genetic variation are genetic mutations, gene flow, genetic drift and random mating.
Genetic variations are the changes in the genetic sequence of the DNA. These genetic variations are important as they allow the living beings to evolve and survive. There are certain factors which affect genetic variation and they are genetic mutations, gene flow, genetic drift and random mating.
A genetic mutation is basically a change in the DNA sequence of a particular gene which causes a different product to form. It is able to create a permanent change to that particular gene's DNA sequence. Gene flow can be defined as the movement of genes in and out of a specific population. Genetic drift is the change in allelic frequency by chance. Random mating is the mating of individuals which is not dictated by any social or genetic preference.
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A farmer wants to plant a large number of quality breed mango trees in a short time for commercial purposes. State and explain the techniques that can be used by the farmer.
(d) Fertilisers can cause pollution to aquatic systems. Overuse of fertilisers may cause eutrophication. Lake Udai
Sagar in India is an example of an aquatic system that shows high levels of eutrophication.
Explain what happens in aquatic environments, such as Lake Udai Sagar, when eutrophication occurs
Answer: eutrophication normally leads to shortage of oxygen supply thus there is an increase in competition between marine organisms for oxygen.
Explanation:
Where is the most ATP produced in cellular respiration ?
The majority of ATP created during cellular respiration is used in the electron transport chain (oxidative phosphorylation).
Cellular respiration is the mechanism by which glucose molecules are broken down into [tex]CO_2[/tex] and [tex]H_2O[/tex] to provide energy from Adenosine Triphosphate (ATP). Additionally, cellular respiration often occurs in an organism's cells by turning the metabolic energy contained in foods into adenosine triphosphate. Additionally, it occurs in three steps, which are the TCA cycle, electron transport, and glycolysis (Oxidative phosphorylation). As a result, the stage of aerobic cellular respiration that produces the most ATPs is called oxidative phosphorylation.
Normally, ATP releases energy by dismantling any weak phosphate cells that may be present. The energy that is released as the phosphate cell disintegrates is then put to use. ADP is created after ATP.
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Adam writes the following hypothesis, "Grasshoppers prefer plants with higher levels of
sugar content" His hypothesis was not supported by his data but he wants to find out if
other insects prefer plants with higher levels of sugar in them. Why is his original
hypothesis still valuable?
A. It can lead to further investigations
B. It is clearly written
C. It involves the study of insects
D. It was disproven
Answer:
b
Explanation:
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please help fast!!!! the main carbohydrates found in our food are in the form of _____ and _____. its from grade 6th chapter 2 components of food 50 points
Answer:
tod sun a qu e sjjee'
Explanation:
wins uend de iue dnauw oiptua hagnte pao
Answer:
starch and sugar
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A population exceeding its carrying capacity will suffer a(n) ____________________ or ____________________, unless the excess individuals can switch to new resources or move to a new area.
A population exceeding its carrying capacity will suffer a(n) dieback; crash or crash; dieback, unless the excess individuals can switch to new resources or move to a new area.
A population is in overshoot while it exceeds to be had wearing ability. A populace in overshoot might also additionally completely impair the long-time period effective capacity of its habitat, lowering destiny wearing ability. It might also additionally continue to exist quickly however will finally crash because it depletes important herbal capital (useful resource) stocks. Carrying ability may be described as a species' common populace length in a specific habitat. The species populace length is confined through environmental elements like good enough food, shelter, water, and mates. If those wishes aren't met, the populace will lower till the useful resource rebounds.
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1. Describe the structure and function of each of the
following:
(a) chromosome
(b) DNA
(c) gene
(d) allele
How can matter be arranged, and how do we model the arrangement of matter?
Answer:
Matter can be arranged in a variety of ways, including as a solid, liquid, or gas.
We can model the arrangement of matter using the kinetic molecular theory
Explanation:
Matter can be arranged in a variety of ways, including as a solid, liquid, or gas. In a solid, the particles that make up the matter are packed closely together and are not able to move around freely.
In a liquid, the particles are more spread out and are able to move around a bit more, but are still close together. In a gas, the particles are very spread out and are able to move around freely.
We can model the arrangement of matter using the kinetic molecular theory, which states that the particles in a substance are in constant motion and that the properties of the substance depend on the average kinetic energy of the particles.
This theory helps us understand how matter behaves and how it changes between different states.
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Theobroma cacao (cacao) is the tree that produces seeds that are turned into chocolate. These trees provide many poor people in the tropics with some cash income. However, these farmers face many obstacles to production of their crop, including temperature and rainfall changes caused by atmospheric CO2 increases, and many diseases and pests. Analysis of the cacao genome showed that there is some (but not a lot) of genetic variation in the 10 major varieties. Which of the following strategies would be most useful in the long term in reducing pressures faced by cacao farmers? Select one:
A. Fertilize the trees in closely spaced areas and add fungicides and pesticides to eliminate pests.
B. Plant more trees in the temperate zone.
C. Plant trees farther apart so that disease transmission rates from one tree to the next will be lower.
D. Crossbreed cacao strains that produce high-quality cacao beans and ones resistant to a disease. Clear my choice
Answer:
B. Plant more trees in the temperate zone.
Explanation:
The presence of abundant cabondioxide (CO2) in the atmosphere is as result of a decrease in plants populations.
plants makes use of CO2 in photosynthesis a process in which green plants manufacture their food Abundance of trees helps to clear the environment from excess CO2 through their utilization leading to a fresh and enabling environment.
Hence their is need to plant more trees in temperate and avoid deforestation of trees to enable plant make of CO2 and reduced the adverse effect of its excess in the environment.
Structures as different as human arms, bat wings, and dolphin flippers contain many of the same bones, which develop from similar embryonic tissues. These structural similarities are an example of ________. Structures as different as human arms, bat wings, and dolphin flippers contain many of the same bones, which develop from similar embryonic tissues. These structural similarities are an example of ________. the evolution of similar appearance as a result of common function homology the evolution of common structure as a result of common function convergent evolution
Answer:
homology.
Explanation:
These similarities in structural are an example of homology because human arms, bat wings, and dolphin flippers are different organisms that have the common ancestor. The similar bone structure of different organisms and different its function is due to common ancestor. Homology similarity of the structure and physiology of different species of organisms due to their descent from a common evolutionary ancestor so we can say that these structural similarities are an example of homology.
I need help plz!!!!!!!!why are the structures of plants ideal for photosynthesis?
Answer:
grrr science I aint helping LOL! im kidding HERE hope this helllpppsssss! (:
Explanation:
Plants have two major structural systems: the root system and the shoot system. ... The shoot system transports water and nutrients to leaves and flowers. The leaves of the plant are the main location for photosynthesis. Plant reproduction occurs through pollination of the flower and fertilization.
Plants have a root system, a stem or trunk, branches, leaves, and reproductive structures (sometimes flowers, sometimes cones or spores, and so on). Most plants are vascular, which means they have a system of tubules inside them that carry nutrients around the plant.
Unlike animals, however, plants use energy from sunlight to form sugars during photosynthesis. In addition, plant cells have cell walls, plastids, and a large central vacuole: structures that are not found in animal cells. Each of these cellular structures plays a specific role in plant structure and function.
The accepted theory of evolution suggests that (Chose all appropriate answers.)
A) traits acquired in ones life time can be passed on.
B) Species change over time.
C) Living species are related to extinct species.
D) different species can interbreed.
E) inherited variation allows some members of a population to be more fit than others.
F) animals that look alike are the most closely related.
Answer:
B
Explanation:
evolution is the change in the characteristics of a species over several generations and relies on the process of natural selection. The theory of evolution is based on the idea that all species? are related and gradually change over time
Theory of evolution includes the idea that the species are related to each other and changes with time. It states that inherited variation allows some members of a population to be more fit than others.
What is theory of evolution?Theory of evolution is based on genetic variation which affect phenotype of an organism in particular population.
The main theories of evolution is as follows:
Lamarkism: It is theory of inheritance of many acquired characters.Darwinism: it postulates the theory of natural selection.Mutation theory of evolution: proposed by Hugo de Varies.Neo-Darwinism: it is modified version of natural selection theory.According to these theories, traits are inheritable, species changes over time, inherited variation allows some members of a population to be more fit than others.
Thus, the correct options are A, B and E.
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Plant cells have a cell membrane and a _______. Animal cells only have a cell membrane.
Skin
Cell Wall
Nucleus
Ribosome
Answer:
Plant cells have a cell membrane and a cell wall Animal cells only have a cell membrane.
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What is the genetic basis behind the appearance and gender of calico cats?
The gene for "orange or black coat" is on the X chromosome, so if "orange" and "black" are active in different cells, female cats can have both colors of calico cat's coat. Yes, because male cats only have one X. The chromosome is her only one of these colors.
The calico, or more specifically tortoiseshell, pattern of cats is observed in female (or rarely male XXY) cats with different alleles at the coat color locus on the X chromosome. One of the X chromosomes carries alleles for black fur pigment and the other for orange fur pigment. Random inactivation of one of the X chromosomes causes orange and black spots on the cat's coat. Males with a single X chromosome have either orange or black fur, depending on which allele they possess. Calico cats have large white spots along with orange or black spots on their fur due to an autosomal gene that causes white spots.
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the spindles contain cellulose microfibrils in addition to microtubules, whereas animal spindles do not contain microfibrils
In humans, sister chromatids are distinct from one another, although they are identical in animals: Animal spindles lack microfibrils, but the spindles in the spindles contain both microtubules and microfibrils.
A tiny, hollow tube-like structure that can be discovered in the cytoplasm of both plant and animal cells. The form of a cell is supported in part by microtubules. Animal cells have cytoplasmic microtubules that resemble the mitotic spindle fibres and are linked to centriole satellites. The existence of these proteins and their potential contribution to cell shape maintenance are examined. Spindle fibres protrude from the centrioles in animal cells. However, spindle fibres arise from the cell's centrosome area in plant cells, which do not have centrioles.
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Capillary action, which allows plant sap to flow through a tree, is the result of cohesion between water molecules. True False
Capillary action happens in light of the fact that water is tacky, on account of the powers of attachment (water particles like to remain nearby) and bond (water atoms are drawn in and stick to different substances).
The development of water particles in the plant body is because of the cement powers between the water atoms and surfaces of the root and stems. The durable powers present between the water particles keep them intact and back off their transportation.
Since water particles like to remain together (attachment) and like to adhere to the walls of the containers of cellulose (bond), they ascend the cylinders as far as possible from the roots to the leaves. Water then, at that point, dissipates from the leaves, assisting with drawing up additional water from the roots. This interaction is called hairlike activity.
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What processes are used in light-independent reactions (photosynthesis)? Please name all.
What processes are used in light-dependent reactions (photosynthesis)? Please name all.
Word Bank:
Processes: ATP Synthase, Calvin Cycle, Electron Transport Chain, Photosystem I, Photosystem II
The light-independent reactions use stored chemical energy from the light-dependent reactions in order to fix carbondioxide gas and create a product that can be converted into glucose.
Define the process of photosynthesis?Photosynthesis is that kind of process in which green plants and organisms prepare their own food in the presence of sunlight to neutralize the reaction.
The process of photosynthesis takes place in two stages one stage is known as a light-dependent reaction while the other stage is known as a light-independent reaction.
ATP Synthase:
The ATP synthase is also known as a mitochondrial enzyme which is localized inside the inner membrane, where it catalyzes the synthesis of ATP from ADP and phosphate.
Calvin Cycle:
The process of the chemical reaction is performed by the plants for the reduction of carbon dioxide and other compounds into glucose.
Electron Transport Chain:
The electron transport chain is that chain in which a series of four protein complexes couple redox reactions, creating an electrochemical gradient that leads to the creation of ATP in a complete system named oxidative phosphorylation.
Photosystem 1:
In this system, the proteins are responsible for the precise arrangement of cofactors and determining redox properties of the electron transfer centers.
Photosystem 2:
First of all the photosystem 2 precise arrangement of cofactors and determine the redox properties of the electron transfer centers.
So we can conclude that the process of photosynthesis is in which the green plants and organisms prepare their own food in the presence of sunlight and oxygen.
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Which set of conditions would most likely cause a change in gene frequency in a population that reproduces sexually
Small population size is most likely to result in changes in allele frequencies in a population. So, the correct option is (B).
The relative frequency of an allele (gene variant) at a specific locus in a population, expressed as a fraction or percentage, is known as allele frequency or gene frequency. It is the proportion of all chromosomes in the population that carry that allele divided by the entire population or sample size. Microevolution is the change in allele frequencies that happens within a population over time.
Given the given facts:
A specific location on a chromosome and a specific allele at that siteA population of N people with ploidy n, which means that each person has n copies of each chromosome in their somatic cells (e.g. two chromosomes in the cells of diploid species)In the population, the allele is found on I chromosomes.Learn more about gene frequency to visit this link
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Full Question: Which set of conditions would most likely cause a change in gene frequency in a population that reproduces sexually A. random mating. B. Small population size. C. No migration into or out of a population. D. Absence of natural selection
the break dawn of food starts from our mouth due to the process of _________,_________and __________?
saliva, esophagus and stomach?
Hypothetically, if a whole population was identical, could it evolve and why?
No because of the whole population was identical they would not have genders and would not be able to reproduce. Reproduction is essential to evolution
what organelle is the colored green and located on the outside of the plant cell?
Answer: Chloroplast
Explanation:
why are melting glaciers dangerous for humans
What are the 3 events in meiosis that contribute to genetic variation ?
Crossing over, Independent assortment, and Random fertilization are the three meiotic events that affect genetic variation.
Crossing over: A process known as crossing over occurs when homologous chromosomes couple up and exchange genetic material during prophase I. Genetic variety is the outcome of this, which causes the development of chromosomes with novel gene combinations.
Independent assortment: The chromosomes arrange at random along the cell equator during metaphase I. This indicates that there is an equal likelihood for each pair of homologous chromosomes to be found in either daughter cell. Genetic variety results from the varied chromosomal arrangements in each daughter cell as a result.
Random fertilization: During fertilization, sperm and egg cells combine to form a zygote. Since sperm and egg cells are produced through meiosis, each one carries a unique combination of chromosomes.
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