Which 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 population

Which 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 population

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 10RQ: Which situation would most likely lead to allopatric speciation? a. A flood causes the formation of...

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Concept explainers

Genetic Evolution

Sexual reproduction produces distinct population variations. Heredity determines the traits and qualities to be passed down to the progeny. Over time, this variation within-species is also affected by the process of human evolution. The study of how genetic variation leads to evolutionary changes is known as genetic evolution. If a trait helps an organism to survive and reproduce, it is more likely to be passed down the generations. It is rare that such traits result in a completely distinct set of traits in descendants than the ancestral population; this can result in the emergence of a new species.

Question

Which 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
population

Definition Definition Process by which new species arise. This occurs when populations of a species become isolated and diverge, developing unique traits through natural selection, genetic drift, or other mechanisms. Over time, these differences accumulate until the populations can no longer interbreed and are considered separate species.

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What is required for sympatric speciation to occur? A. Continuous gene flow between different populations B. Geographic separation of populations C. Two populations that are different begin to reproduce and create hybrids D. Emergence of a reproductive barrier
What pattern of speciation is illustrated by the development of the allopolyploid species? A. allopatric speciation B. sympatric speciation C. cladopatric speciation D. anapatric speciation
What is the greatest source of genetic variation in plant and animal populations? a. Geographic variation b. Recessive masking in heterozygotes c. Selection d. Sexual reproduction
Which could lead to allopatric speciation by two populations of snail? Group of answer choices A. creation of a new mountain range between two populations B. a mutation in all members of one population which prevents gamete fusion between the two populations C. a change in breeding time of one population D. a change in mating behavior in one population but not in the other
Which process in a hybrid zone increases the likelihood of speciation? A. stability – when a hybrid zone remains the same B. reinforcement – when a hybrid zone widens and fewer hybrids are formed C. convergence – when a hybrid zone narrows and more hybrids are formed D. fusion – when a hybrid zone disappears and separate species fuse into one
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Which type of hybrid zone would lead to speciation? A. a hybrid zone b. stable hybrid zone c. A fusion hybrid zone d. reinforcement hybrid zone e. hybird vigor
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