Concepts of Biology
1st Edition
ISBN: 9781938168116
Author: Samantha Fowler, Rebecca Roush, James Wise
Publisher: OpenStax College
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Textbook Question
Chapter 11, Problem 11RQ
What is the main difference between dispersal and vicariance?
a. One leads to allopatric
b. One involves the movement of the organism, whereas the other involves a change in the environment.
c. One depends on a genetic mutation occurring, whereas the other does not.
d. One involves closely related organisms, whereas the other involves only individuals of the same species.
Expert Solution & Answer
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Which of the following could result in allopatric speciation?
A.
Two populations of a species are separated by a river that they are unable to cross.
B.
Two populations of a species are separated by a field that is too dry during the summertime.
C.
One group within a population mates during the evenings and another during the mornings.
D.
One group within a population develops a new mating ritual that is not recognized by the other.
A small number of birds arrive on an island from a neighboring larger island. This small population begins to adapt to the new food plants available on the island, and their beaks begin to change. About twice a year, one or two more birds from the neighboring island arrive. What effect do these new arrivals have?
A.
Their arrival tends to retard adaptation to the new food plants.
B.
Their arrival speeds the process of speciation.
C.
Their arrival tends to promote adaptation to the new food plants.
D.
Their arrival will likely prompt genetic drift.
E.
Their arrival represents a colonizing event.
Which of the following terms best describes the biological scenario where species that look similar in allopatry look different in sympatry?
a.
Character displacement
b.
Tempo
c.
Fusion
d.
Post-zygotic barriers
Chapter 11 Solutions
Concepts of Biology
Ch. 11 - Figure 11.7 Do you think genetic drift would...Ch. 11 - Which scientific concept did Charles Darwin and...Ch. 11 - Which of the following situations will lead to...Ch. 11 - What is the difference between micro- and...Ch. 11 - Population genetics is the study of ________. a....Ch. 11 - Galapagos medium ground finches are found on Santa...Ch. 11 - In which of the following pairs do both...Ch. 11 - The wing of a bird and the arm of a human are...Ch. 11 - The fact that DNA sequences are more similar in...Ch. 11 - Which situation would most likely lead to...
Ch. 11 - What is the main difference between dispersal and...Ch. 11 - Which variable increases the likelihood of...Ch. 11 - The word “theory” in theory of evolution is best...Ch. 11 - Why are alternative scientific theories to...Ch. 11 - If a person scatters a handful of plant seeds from...Ch. 11 - Explain the Hardy-Weinberg principle of...Ch. 11 - Describe natural selection and give an example of...Ch. 11 - Why do scientists consider vestigial structures...Ch. 11 - Why do island chains provide ideal conditions for...Ch. 11 - Two species of fish had recently undergone...Ch. 11 - How does the scientific meaning of “theory” differ...Ch. 11 - Explain why the statement that a monkey is more...
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- Why is reproductive isolation insufficient to define a species? A. Reproductive isolation doesn't take outgroups into account. B. This definition overlooks artificial reproduction, such as in zoos. C. This definition excludes organisms that reproduce asexually. D. Reproductive isolation can be accomplished in a variety of ways.arrow_forwardA mountain range divides a freshwater snail species into two large isolated populations. Erosion eventually lowers the range and brings the two populations together again, but when they mate, the resulting hybrids all produce sterile young. This scenario is an example of: O A. allopatric speciation by vicariance. O B. sympatric speciation. C. parapatric speciation. D. allopatric speciation by peripheral isolation. « » A Moving to another question will save this response. 8:02 AM 11/10/20 a 18 hp 近arrow_forwardWhich of the following would result in allopatric speciation by dispersal? A. A river separating a previously contiguous population of salamanders B. A receding water table separating a population of frogs into two separate wetlands C. Finches colonizing an island exposed by water level changes in a reservoir D. A population of trees being split in two by an advancing glacierarrow_forward
- Islands are well known for having many endemic (unique) species. What is a likely explanation for this pattern? O A. The type of organism that is a good colonizer has more than the average amount of genetic variability, so it's more likely to speciate. O B. Colonizers encounter fewer competitors on an island, so they can diversify. O C. Islands are more complex habitats than continents are, so they have more niches for specializations. O D. Humans bring partly or fully domesticated species with them when they arrive on islands. O E. Colonizers are likely to have more diversity than local populations and thus outcompete them. «< Question A Moving to another question will save this response. PrtScn F8 Home F9 End F10 PgUp PgDn F12 F11 DII F5 F6 F7 F3 F4 & %23 $ 7 8 9. 4arrow_forwardHow does stochasticity influence dispersal? At what scale? a. Dispersal is probabilistic; population O b. Environmental stochasticity controls dispersal; individual С. Dispersal is deterministic; individual O d. Dispersal is probabilistic; individual е. Environmental stochasticity controls dispersal; populationarrow_forwardA defining characteristic of sympatric speciation is a.The appearance of new species in the midst of old ones b.Asexually reproducing populations c.Geographic isolation. d.Large populationsarrow_forward
- Which of the following is a good description of Sympatric speciation? A. Speciation without geographic isolation B. Changes in sequence of DNA of an organism C. Speciation due to geographical isolation D. The change in the genetic characteristics of a population of organisms over timearrow_forwardWhich of the following is an example of postzygotic reproductive isolation?a. Sperm of species A dies in the oviduct of species B before fertilization can take place.b. Hybrid zygotes between species A and B are spontaneously aborted early indevelopment.c. The mating seasons of species A and B do not overlap.d. Males of species A are not attracted to the pheromones produced by the females ofspecies B.arrow_forwardSuppose two species of morning glories are reproductively isolated because in one species the flowers bloom in early April and in the other species they flower in mid-May. This would be an example of _______ isolation, which is a form of _______ isolation. a. habitat; prezygotic b. temporal; prezygotic c. temporal; postzygotic d. behavioral; postzygotic e. habitat; postzygoticarrow_forward
- A sudden increase in gene flow between two somewhat isolated populations would most likely Group of answer choices a. have no effect on the chance of speciation b. decrease the genetic similarity between the two populations c. increase the chance of speciation d. increase the genetic divergence between the two populations e. decrease the chance of speciationarrow_forwardThe formation of new species due to geographic barriers is called a. isolation speciation.b. allopatric speciation.c. allelomorphic speciation.d. sympatric speciation.e. symbiotic speciation.arrow_forwardBiology Resource partitioning due to disruptive selection is more likely to cause speciation in: Group of answer choices D. peripatric populations than in sympatric populations. A. allopatric populations than in peripatric populations. C. sympatric populations than in allopatric populations. B. allopatric populations than in sympatric populationarrow_forward
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