1 How can geography lead to reproductive isolation? a. Some populations may have a milder habi tat than other populations. b. Subspecies may choose to occupy different areas for competitive reasons. c. Extremes of temperatures may reduce the breeding opportunities for some. d. A physical barrier may arise and separate a population, preventing interbreeding.

1 How can geography lead to reproductive isolation? a. Some populations may have a milder habi tat than other populations. b. Subspecies may choose to occupy different areas for competitive reasons. c. Extremes of temperatures may reduce the breeding opportunities for some. d. A physical barrier may arise and separate a population, preventing interbreeding.

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 12RQ: Which variable increases the likelihood of allopatric speciation taking place more quickly? a. lower...

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A characteristic that exhibits smooth changes in populations distributed along a geographical gradient is called a: a. ring species. b. hybrid. c. cline. d. hybrid breakdown. e. subspecies.
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
Survivorship curves are a never differ among close relatives within a taxonomic group. b used to depict when individuals survive well and when they do not. c the same for all populations over time. d the same for all individuals. e used to accurately determine how old individuals in a population will be at death.
How do hatcheries (i.e. farmed salmon) impact wild salmon population genetics? A: Increase species variability between different populations B: Decrease the resilience of wild populations C: Decrease mixing between different populations D: Overcrowd streams when they return to where they were spawned
Intraspecific competition reduces allelic diversity by Select one: a. relieving predator pressure on the prey population b. allowing K-selected species to have a selective advantage over r-selected species c. creating a competitive advantage to certain alleles d. allowing two different species occupying the same niche to compete for resources
If reinforcement is weak and hybrids are not completely infertile, a. genetic divergence between populations may be overcome by gene flow. b. speciation will occur 100% of the time. c. gene flow between populations will be impossible. d. the speciation will be more likely than if hybrids were completely infertile.
Speciation: A. is a process by which populations of one species diverge genetically and which produces one or more new species B. is the result of minor extinction events C. only results from interspecific hybridization D. is completed when two different species are able to interbreed E. always takes millions of years
All are true about reproductive isolation, except: A. Reproductive isolation hinders interbreeding of populations B. isolation or barrier can only occur before mating C. some hybrids can still reproduce Question: small and large species of dogs are difficult to breed and may not likely occur naturally because of their size difference, this is an example of: A. Geographic isolation B. Behavioral isolation C. temporal isolation D. Mechanical isolation
Which reproductive isolating mechanism(s) might be operating in each situation? There may be more than one possible answer for each. a.Different species of songbirds inhabit the same forest yet do not interbreed. b.Salmon and trout populations breed in the same streams in British Columbia, during the same period. c.A gardener has two closely related plant species. One blooms in the summer; while the other blooms in the spring.
What is Speciation? A) Movement of a population from one area to another B) Becoming part of an adopted species C) Creation of a new species
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
Male frogs commonly attract females of the same species using a unique, species-specific call (or "song"). Mónica, an ecologist, notices that there are two closely-related species of frogs living in the pond in her backyard. However, these species never interbreed because it appears that females are only attracted to the call of their own species. This is an example of _________________. a. Ecological isolation b. Hybrid inviability c. Gametic isolation d. Transpecies isolation e. Behavioral isolation