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 10RQ
Which variable increases the likelihood of allopatric
- lower rate of mutation
- longer distance between divided groups
- increased instances of hybrid formation
- equivalent numbers of individuals in each population
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Which variable increases the likelihood of allopatric speciation taking place more quickly?
Question 4 options:
Lower rate of mutation
Increased instances of hybrid formation
Longer distance between divided groups
Equivalent numbers of individuals in each population
Which of the following would NOT be a reason for a speciation event?
Group of answer choices
comfortable environmental conditions
plentiful food supplies
very few natural disasters and/or catastrophic events
increased amounts of predators
lack of predators
What are characteristics of sympatric speciation? Select all that apply.
Reproductive isolation necessary to end gene flow
Divergence within a population leads to speciation
Absence of a physical barrier
Presence of a physical barrier
Reproductive isolation unnecessary to end gene flow
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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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- The first step toward speciation is isolation of populations. It means that the populations need to be physically separated from each other. -True -Falsearrow_forwardA group of birds colonize an island. Over time, they become different from the mainland source population and reach the point where they can no longer interbreed with one another They are now called _________________ and the process is called ________________speciation. 1) 2) 3) 4)arrow_forwardSelect the correct terms: Speciation due to geographic separation and (genetic divergence / gene flow) of two populations is considered (allopatric / sympatric) speciationarrow_forward
- Which is mandatory for speciation to occur? • reproductive isolation • migration •divergence in traits •geographic isolation vicariancearrow_forwardGene flow is necessary for speciation to take place. Group of answer choices True Falsearrow_forwardWhich type of event is likely to initiate speciation where a mountain range or land bridge forms? • parapatry • sympatry•dispersal• vicariancearrow_forward
- Agrostis tenuis grasses tolerant of zinc metals in the soil (after evolving from metal-sensitive grasses near mine soils contaminated with zinc over the past 100 years), is an example of: allopatric speciation by vicariance allopatric speciation by dispersal peripatric speciation parapatric speciationE. sympatric speciationarrow_forwardWhich variable increases the likelihood of allopatric speciation taking place more quickly? a. lower rate of mutation b. longer distance between divided groups c. increased instances of hybrid formation d. equivalent numbers of individuals in each populationarrow_forwardPopulation divergence occurring as a result of females in a species consistently choosing males of a particular color is an example of ecological speciation Haldane's Rule genetic drift sexual selectionarrow_forward
- Two species evolve different preferences for which tree to live on. The trees are found in the same forest and thus two species are produced from the same geographic location. This is best described as which of the following? Sympatric speciation Vicariance speciation Dispersal speciation Allopatric speciationarrow_forwardHow would the history of a genus be affected by a starting with only 1 species? Group of answer choices Much higher likelihood of immediate extinction. There would essentially be no change. The speciation rate would likely tripple. Much lower chance of extinction. The speciation rate would likely double.arrow_forwardWhat are the most common mechanisms of sympatric speciation and in which major group of organisms does this happen most often? ( 500 words min)arrow_forward
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