Biology 2e
2nd Edition
ISBN: 9781947172517
Author: Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher: OpenStax
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Textbook Question
Chapter 18, Problem 21CTQ
Why do island chains provide ideal conditions for adaptive radiation to occur?
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Describe one example of adaptive radiation.
Which of the following does not increase the rate of adaptive radiation?
A Competition for resources.
Short generation times.
C)A major environmental change.
Two species that produce only infertile offspring.
Why do some species survive while others go extinct?
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Chapter 18 Solutions
Biology 2e
Ch. 18 - Figure 18.14 Which is most likely to survive,...Ch. 18 - Figure 18.22 If two species eat a different diet...Ch. 18 - Figure 18.23 Which of the following statements is...Ch. 18 - Which scientific concept did Charles Darwin and...Ch. 18 - Which of the following situations will lead to...Ch. 18 - Which description is an example of a phenotype? A...Ch. 18 - Which situation is most likely an example of...Ch. 18 - Which situation would most likely lead to...Ch. 18 - What is the main difference between dispersal and...Ch. 18 - Which variable increases the likelihood of...
Ch. 18 - What is the main difference between autopolyploid...Ch. 18 - Which reproductive combination produces hybrids?...Ch. 18 - Which condition is the basis for a species to be...Ch. 18 - Which situation is not an example of a prezygotic...Ch. 18 - Which term is used to describe the continued...Ch. 18 - Which components of speciation would be least...Ch. 18 - If a person scatters a handful of garden pea plant...Ch. 18 - Why do scientists consider vestigial structures...Ch. 18 - How does the scientific meaning of “theory” differ...Ch. 18 - Explain why the statement that a monkey is more...Ch. 18 - Why do island chains provide ideal conditions for...Ch. 18 - Two species of fish had recently undergone...Ch. 18 - Why can polyploidy individuals lead to speciation...Ch. 18 - What do both rate of speciation models have in...Ch. 18 - Describe a situation where hybrid reproduction...
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- Ernst Mayr defined a biological species as a population whosemembers can exchange genetic material during reproduction (seechapter 14). How does horizontal gene transfer complicate thisdefinition of species?arrow_forwardWhich of the following is likely a reason why evolutionary radiation would occur on islands? A) there are many more species on islands B) islands tend to have more favourable habitats than continents because they are moderated by the ocean C) islands may have fewer animal and plant groups and thus provide more ecological opportunities D) organisms can disperse easily across oceans E) islands often have more diverse habitats than continentsarrow_forwardDescribe three components of an Adaptive Radiation.arrow_forward
- What type of reproductive isolation is due to organisms that have different mating seasons?arrow_forwardDoes dispersal occurrence necessarily mean that gene flow occurs?arrow_forwardWhat conditions make it likely that a small group of closely related species will increase to a large number of species by means of rapid speciation?arrow_forward
- Why is it important for organisms to adjust the timing of their life history to seasonal changes in the environment?arrow_forwardAdaptive radiations can be a direct consequence of three of the following four factors. Select the factor that is NOT a direct consequence of adaptive radiation. Select one: a. Genetic drift b. Vacant ecological niches (niches are environment "space" where a particular organism has resources required to survive and reproduce) c. New evolutionary innovations d. Colonization of a new region that contains suitable habitat and few competitor speciesarrow_forwardWhy are some species unable to adapt to climate change?arrow_forward
- What kinds of characteristics make species especially likely to go extinct?arrow_forwardWhat are the five mass extinctions of the past and the current theory of the sixth mass extinction? For each extinctions, what caused the extinction and how was ecosystem stability impacted? Was there any speciation that occurred afterward?arrow_forwardAdaptive radiations will most likely occur in areas where; The climate is the same year round The landscape is mostly homogenous and all of the habitats are similar to each other The landscape has very limited soil nutrients The landscape is highly variable and there are many different habitatsarrow_forward
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