BIOLOGY
12th Edition
ISBN: 9781260169614
Author: Raven
Publisher: RENT MCG
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Textbook Question
Chapter 22, Problem 2A
Natural selection can
a. enhance the probability of
b. enhance reproductive isolation.
c. act against hybrid survival and reproduction.
d. All of the choices are correct.
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Students have asked these similar questions
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
1) In allopatric speciation, geographic separation of two populations
a.reduces the relative fitness of hybrid offspring.
b.is sufficient for speciation to occur.
c.allows gene flow between them.
d.inhibits gene flow between them.
Chapter 22 Solutions
BIOLOGY
Ch. 22.1 - Understand the biological species concept and why...Ch. 22.1 - Define the two kinds of reproductive isolating...Ch. 22.1 - Describe the relationship of reproductive...Ch. 22.2 - Prob. 1LOCh. 22.2 - Prob. 2LOCh. 22.3 - Prob. 1LOCh. 22.3 - Prob. 2LOCh. 22.4 - Compare and contrast sympatric and allopatric...Ch. 22.4 - Prob. 2LOCh. 22.5 - Prob. 1LO
Ch. 22.5 - Prob. 2LOCh. 22.6 - Prob. 1LOCh. 22.6 - Prob. 2LOCh. 22.7 - Prob. 1LOCh. 22.7 - Prob. 2LOCh. 22 - Prob. 1IQCh. 22 - Prob. 2IQCh. 22 - Prezygotic isolating mechanisms include all of the...Ch. 22 - Reproductive isolation is a. a result of...Ch. 22 - Problems with the biological species concept...Ch. 22 - Prob. 4UCh. 22 - Prob. 5UCh. 22 - Prezygotic isolation a. always involves mechanisms...Ch. 22 - Speciation by allopolyploidy a. takes a long time....Ch. 22 - Adaptive radiation a. is the result of enriched...Ch. 22 - Prob. 9UCh. 22 - Character displacement a. arises through...Ch. 22 - Prob. 11UCh. 22 - If reinforcement is weak and hybrids are not...Ch. 22 - Natural selection can a. enhance the probability...Ch. 22 - Hybridization between incompletely isolated...Ch. 22 - Natural selection can lead to speciation a. by...Ch. 22 - Natural selection can lead to the evolution of...Ch. 22 - Prob. 2SCh. 22 - Refer to figure 22 6 In Texas. Drummond s phlox is...Ch. 22 - Refer to figure 22.16. Geospiza fuliginosa and...
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- Hybridization between incompletely isolated populations a. always leads to reinforcement due to the inferiority of hybrids. b. can serve as a mechanism for preserving gene flow between populations, thus preventing speciation. c. only occurs in plants. d. never affects rates of speciation.arrow_forwardA 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_forwardWhich of the following traits does not describe a r-selected species? A. rapid development B. low parental investment C. high reproductive rates D. short life spans E. late maturationarrow_forward
- Q1: A child with a heterozygous genotype for eye color will manifest which eye color? (Assuming blue is recessive, and brown is dominant allele for eye colors) A. GreenB. The child will have Heterochromia iridumC. BlueD. Brown Q2: F1 ligers can reproduce, but their succeeding generations lose this ability, what is happening?A. Speciation happensB. Hybrid inviability happensC. Hybrid breakdown happensD. Hybrid sterility happens Q3: A population tested with the Hardy Weinberg equation results to 1=1. What does this imply? A. The population has some individuals with mutated genesB. The population is gradually changingC. There is a disaster that decimated the populationD. The population is not changingarrow_forwardAllopatric, but not sympatric, speciation requiresa. reproductive isolation.b. geographic isolation.c. spontaneous differences in males and females.d. prior hybridization.e. rapid rate of mutation.arrow_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_forward
- c. increase; decreasing d. decrease; decreasing 28. Which of the following will NOT promote speciation between a population of the same species? a. geographic isolation b. gene flow L c. genetic drift d. natural selection e. mutationarrow_forwardDefine a. mutation b. natural selection c. founder effect d. bottleneck e. gene flow f. nonrandom matingarrow_forwardIf gene flow between two populations stops, which of the following could occur given enough time? a. speciation b. the population each gain unique alleles c. the timing of reproduction changes ending their ability to interbreed d. frequencies of alleles shift in different ways e. these are all things that could occur if gene flow between two populations of one species ended, given enough timearrow_forward
- Identify each of the following reproductive barriers as prezygotic or postzygotic. a. One lilac species lives on acidic soil, another on basic soil. b. Mallard and pintail ducks mate at different times of the year. c. Two species of leopard frogs have different mating calls. d. Hybrid offspring of two species of jimsonweed always die before reproducing. e. Pollen of one kind of pine tree cannot fertilize another kind.arrow_forwardIn dioecious plants, males usually produce larger flowers that attract more pollinators than do females. This is an example of a. character displacement b. sexual selection through female choice c. sexual selection through male-male competition d. divergence in resource use e. a cost of reproductionarrow_forwardWhich of the following traits is more associated with an Opportunistic (Equilibrial) species? Which of the following traits is more associated with an Opportunistic (Equilibrial) species? A. Short maturation time B. Producing offspring at many different times over the course of life C. Producing a lot of eggs at one time D. High juvenile mortality E. High level of parental carearrow_forward
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