The Grants have studied finches on the Galapagos Islands for 40+ years. During times of drought, there is less green/flowering vegetation available as a food source for the finches. This leaves only the hard, thorny seeds. The Grants have found that during drought, finches with larger beaks survive at a higher rate because they can access the food source. This would be an example of

The Grants have studied finches on the Galapagos Islands for 40+ years. During times of drought, there is less green/flowering vegetation available as a food source for the finches. This leaves only the hard, thorny seeds. The Grants have found that during drought, finches with larger beaks survive at a higher rate because they can access the food source. This would be an example of

Concepts of Biology

1st Edition

ISBN:9781938168116

Author:Samantha Fowler, Rebecca Roush, James Wise

Publisher:Samantha Fowler, Rebecca Roush, James Wise

Chapter11: Evolution And Its Processes

Section: Chapter Questions

Problem 3RQ: Which of the following situations will lead to natural selection? a. The seeds of two plants land...

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You are studying a species of beetle known as a Flumbodoodle Beetle. The beetle has long spikes on its shell to defend itself from potential predators. You are interested in studying evolution in this beetle. Which of the following studies do you not need to conduct to determine if the long spike trait can evolve by natural selection. a. A study that determines whether beetles with longer spikes survive and reproduce better than beetles with shorter spikes. b. A study that measures the spike length variation across multiple individuals in a population. c. A study where you measure the spike length on the parents and a study where you measure the spike length on the offspring. d. A study that determines whether these spikes on the beetle are also used in mate choice contexts.
In the population of insects shown, insects with spots have the genotype Aa or AA and bugs with no spots have the genotype aa. Which argument best supports the phenomenon shown in the diagram? There was an increase in the fitness of the gene A. There was an increase in the fitness of the gene a. There was an increase in the mutation rate of gene A. There was an increase in the mutation rate of gene a.
This model shows the process of natural selection on rabbits demonstrating variation in fur color over several generations. Using the model, what most likely led to the loss of white furred rabbits in the population? A) the white rabbits did not reproduce fast enough to survive B) white was a recessive trait and therefore not passed on to any offspring C) the white fur was a favorable trait but was never prevalent in the population D) the rabbits with white fur had less camouflage in the environment and were more easily preyed on by predators
Why did dark-colored rock pocket mice first appear in a population of light-colored rock pocket mice? Group of answer choices A. The rock pocket mice have a mutation in a gene that leads to the dark fur color. B. Individuals change color to blend in with the environment C. Predators eat light-colored rock pocket mice. D. There is dark lava rock in the area where they live E. All of the answers are correct F. None of the answers are correct
A population of lizards in Northern California is brown and is not poisonous to birds. A population of lizards in Southern California is orange and is poisonous to birds. In central California, where the two species overlap, a new species of non-poisonous, orange lizards arose. Which of the following statements best explains the existence of non-poisonous orange lizards? A) Non-poisonous brown lizards changed color once they noticed birds did not eat orange lizards. B) Non-poisonous orange lizards have a selective advantage since birds avoid orange lizards. C) Non-poisonous lizards turn orange by eating orange flowers and then pass the trait on D) Non-poisonous orange lizards have a selective disadvantage since they cannot blend in. E) Non-poisonous brown lizards are more attractive to mates.
If this model continues, with no major changes to the environment, what do you expect to happen? A) rabbits will continue to get lighter over time B) there is no way to predict because mutations are random C) mutations will all die out leaving only the original fur color D) dark gray fur will become the common phenotype because it favors survival
A subpopulation of a species of birds migrates to a different location from the rest of the species for breeding purposes. How might the genes change in the subpopulation? A. Their genes would change randomly and eventually revert to normalcy, which would allow the subpopulation to return to the main population. B. Their genes would change to better allow them to survive and reproduce in their new location. C. Their genes would not change at all and they would merely be a subpopulation living in a different location. D. Their genes would change so that they would continue to be well-adapted to their former location.
The protruding tusk on a narwhal is an enlarged tooth with sensory capabilities. Narwhals are related to other whales. The extreme phenotype of the tusk demonstrates which type of selection? A)Convergent B)Stabilizing C)Directional
Dog breeds are an example of artificial selection, which means ______ selected for certain traits in dogs fill the balnk
When taking the question, it would appear as: Consider global warming, a continual gradual increase in average temperatures. How might you expect this to affect natural selection? A.environmental changes are unpredictable, and natural selection is a random process, so it is difficult to predict outcome B.species from warmer climates are likely to expand their ranges into higher latitudes C.traits that increase reproductive success under warmer temperatures are likely to increase in frequency in a population D.the stress caused by higher temperatures will increase mutation rates
Biologists sometimes say that “natural selection depends on the specific environment where a species lives.” What does this statement mean? A) A) If populations of a species are in different environments, traits that individuals need to meet their needs in each environment will appear. B) Traits can be helpful or harmful. If populations of a species are in different environments, some traits that are helpful in one environment might be harmful in another environment. C) Traits are always either helpful or harmful, and the environment of a population doesn’t matter. If populations of a species are in different environments, the same traits will always be helpful. D) Species were formed to perfectly match their environment. The traits of individuals in a species depend on the specific environment in which they were created.
Dog breeders use selective breeding, also called artificial selection, to maintain a closed genetic lineage, and produce offspring with desirable traits. This violates which Hardy-Weinberg condition? a reproduction b no mutation c random mating d no natural selection