Which of the following is an observation or inference on which natural selection is based quizlet?
Which of the following is an observation or inference on which natural selection is based? Species produce more offspring than the environment can support.
Which pair of scientists would probably have agreed with the process that is depicted by this tree?
| Question | Answer |
|---|---|
| Which pair would probably have agreed with the process that is depicted by this tree? | Lamarck and Wallace |
| How many separate species, both extant and extinct, are depicted in this tree? | 6 |
| According to this tree, what percent of the species seem to be extant (i.e., not extinct)? | 66% |
Can you identify the process by which natural selection acts on an insect population exposed to pesticides?
Can you identify the process by which natural selection acts on an insect population exposed to pesticides? genetic drift. If color is an inherited trait in beetles, and birds are more likely to eat brown beetles than green beetles, the frequency of the green allele will increase.
Which of the following are examples of evolution?
Answer and Explanation: An example of evolution is antibiotic-resistant bacteria. When bacteria are exposed to antibiotics, they died.
Which of the following observations helped Darwin shape his concept of descent with?
Which of the following observations helped Darwin shape his concept of descent with modification? Species diversity declines farther from the equator.
Which observations led Darwin to establish a relationship between extinct and living animals select all that apply?
Which observations led Darwin to establish a relationship between extinct and living animals? The fossilized remains of giant sloths were found in places where smaller sloths now live. The bony shells of armadillos resembled the shells of ancient Glyptodon fossils.
Which of the following must exist in a population for natural selection can act upon that population?
for natural selection to occur, variation must exist in a population.
Which of the following pieces of evidence most strongly supports the common origin of all life on Earth?
So, the correct answer is 'All organisms use the same molecules (DNA and RNA) to store and transmit hereditary'
Which of the following statements about the amoeba population described in the final stage is true?
Which of the following statements about the amoeba population described at the end of the tutorial is true? It is more vulnerable to extinction due to lack of genetic variation.
How can scientists determine whether two different species came from a common related ancestor?
Homologous genes Biologists often compare the sequences of related genes found in different species (often called homologous or orthologous genes) to figure out how those species are evolutionarily related to one another.
What is the meaning of evolution answer?
Evolution is a process of gradual change that takes place over many generations, during which species of animals, plants, or insects slowly change some of their physical characteristics.
Which of the following features were present in the transitional species between amphibian tetrapods and the fishes?
Fins, scales and expanded ribs were present in the transitional species between amphibian tetrapods and the fishes.
Which of the following are lines of evidence supporting the theory of evolution by natural selection?
There are five lines of evidence that support evolution: the fossil record, biogeography, comparative anatomy, comparative embryology, and molecular biology.
What is the conclusion of Darwin’s theory?
Offspring vary in their heritable traits. Based on these simple observations, Darwin concluded the following: In a population, some individuals will have inherited traits that help them survive and reproduce (given the conditions of the environment, such as the predators and food sources present).
What are the several observation of Darwin that led him to conclude that life evolves?
Darwin's observations that led to his theory of natural selection are: Overproduction – all species will produce more offspring than will survive to adulthood. Variation – there are variations between members of the same species. Adaptation – traits that increase suitability to a species' environment will be passed on.
Which of the following conditions must be in place for a certain character or trait to be selected for?
Which of the following conditions must be in place for a certain character or trait to be selected for? –It must be variable.
Which of the following pieces of evidence support that species change due to certain genetic variations?
Which of the following pieces of evidence supports that species change due to certain genetic variations? Mutation and natural selection both cause changes in a population.
What evidence supports that an organism has common ancestors?
Homologous structures Homologous structures provide evidence for common ancestry, while analogous structures show that similar selective pressures can produce similar adaptations (beneficial features). Similarities and differences among biological molecules (e.g., in the DNA sequence of genes) can be used to determine species' relatedness.
Which of the following statements about amoeba is correct?
The correct answer is Unicellular. Amoeba is a unicellular organism that has the ability to alter its shape. It is grouped under the Kingdom Protista. It is microscopic in structure.
Which of the following statements best describes the true nature of natural selection?
Which of the following statements best describes the true nature of natural selection? Heritable traits that promote reproduction become more frequent in a population from one generation to the next.
What does the scientific evidence tell us about a common ancestor for all living things on Earth?
Like anatomical structures, the structures of the molecules of life reflect descent with modification. Evidence of a common ancestor for all of life is reflected in the universality of DNA as the genetic material and of the near universality of the genetic code and the machinery of DNA replication and expression.
What patterns can be used to identify the ancestry line of an organism?
Homologous structures provide evidence for common ancestry, while analogous structures show that similar selective pressures can produce similar adaptations (beneficial features). Similarities and differences among biological molecules (e.g., in the DNA sequence of genes) can be used to determine species' relatedness.
How would you describe this evolution?
Evolution is a process that results in changes in the genetic material of a population over time. Evolution reflects the adaptations of organisms to their changing environments and can result in altered genes, novel traits, and new species.
How do you explain evolution simply?
Evolution is the process by which species adapt over time in response to their changing environment.
Which evidence would scientists use to make the connection between ancestry of fish and tetrapods using Tiktaalik?
Like a fish, the fossil of Tiktaalik shows evidence of scales, gills, and fins. But inside the fins, Tiktaalik contains limb bones that are characteristic of an early tetrapod.
Why is knowledge of the sarcopterygian lineage so important in understanding animal evolution?
The sarcopterygian ancestor possessed two traits necessary for the evolution of a limbed terrestrial animal: lungs, which provide the ability to breathe air, and appendages with internal skeletal support extending beyond the muscle mass of the trunk.
What are the two conclusions Darwin proposed from his theory of evolution by natural selection?
Darwin proposed that species can change over time, that new species come from pre-existing species, and that all species share a common ancestor.
Which of the following are lines of evidence that support the theory of evolution by natural selection quizlet?
What are the three lines of evidence that support the theory of evolution? Evidence from the fossil record, comparative anatomy, and DNA molecules support the theory of evolution.
What is the conclusion of the theory of evolution?
Hi Parth, Conclusions from Darwin's theory of evolution: Although all the species produce a large number of offspring, populations remain fairly constant naturally. This occurs due to the struggle to obtain food, space and mate. Only those organisms who are fit for the changing environment have the right to survive.
What did Darwin conclude?
Darwin concluded that species change through natural selection, or – to use Wallace's phrase – through "the survival of the fittest" in a given environment.