Biology: The Dynamic Science (MindTap Course List)
4th Edition
ISBN: 9781305389892
Author: Peter J. Russell, Paul E. Hertz, Beverly McMillan
Publisher: Cengage Learning
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Textbook Question
Chapter 22, Problem 5TYK
In the model of allopatric
a. is sufficient for speciation to occur.
b. occurs only after speciation is complete.
c. allows gene flow between them,
d. reduces the relative fitness of hybrid offspring.
e. inhibits gene flow between them.
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Place the following events in the order in which they are most likely to occur by numbering them from 1 to 5. a. Speciation occurs. b. Genetic divergence takes place. c. Geographic barrier arises. d. Gene flow is discontinued. e. Species adapts to a new environment.
In nature, when a lone male lion encounters a pride (a group of lions with a male leader), the two males will often fight to become head of the pride. It has been documented that if the foreign lion wins the battle, he will usually kill the offspring of the weaker lion’s pride. This natural selection process best describes;
Select one:
a.
Fitness within species
b.
Bottleneck effect
c.
Macroevolution
d.
Microevolution
e.
Speciation
A defining characteristic of allopatric speciation is
Group of answer choices
A. Geographic isolation.
B. Aasexually reproducing populations.
C. Occurance of natural selection.
D. The appearance of new species within the distribution range of the parental species.
Chapter 22 Solutions
Biology: The Dynamic Science (MindTap Course List)
Ch. 22.1 - How do the morphological, biological, and...Ch. 22.1 - What is clinical variation?Ch. 22.2 - What is the difference between prezygotic and...Ch. 22.2 - Prob. 2SBCh. 22.3 - Prob. 1SBCh. 22.3 - Why might insects from different host races be...Ch. 22.4 - Prob. 1SBCh. 22.4 - Prob. 2SBCh. 22 - The biological species concept defines species on...Ch. 22 - Prob. 2TYK
Ch. 22 - A characteristic that exhibits smooth changes in...Ch. 22 - Prezygotic is isolating mechanisms: a. reduce the...Ch. 22 - In the model of allopatric speciation, the...Ch. 22 - Prob. 6TYKCh. 22 - If two species of holly (genus Ilex) flower during...Ch. 22 - Prob. 8TYKCh. 22 - An animal breeder, attempting to cross a llama...Ch. 22 - Prob. 10TYKCh. 22 - Apply Evolutionary Thinking How do human...Ch. 22 - Prob. 12TYKCh. 22 - Prob. 13TYKCh. 22 - Prob. 14TYKCh. 22 - Prob. 15TYKCh. 22 - David Hills of Baylor University noted that three...
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- If two species of holly (genus Ilex ) flower during different months, their gene pools may be kept separate by: a. mechanical isolation. b. ecological isolation. c. gametic isolation. d. temporal isolation. e. behavioral isolation.arrow_forwardMany species of birds choose their mates based on how brightly colored they are. If feather color is heritable, how would this violate the assumptions required for a population to be in Hardy-Weinberg equillibrium? HW equilibrium would cause mutations in such a species. A. This is a founder effect В. This is a bottleneck effect C. OD. Mating is non-random. Alleles for brightly colored phenotypes might become more common in the species and allele frequency would change.arrow_forwardProblems with the biological species concept include the fact that a. many species reproduce asexually. b. postzygotic isolating mechanisms decrease hybrid viability. c. prezygotic isolating mechanisms are extremely rare. d. All of the choices are correct.arrow_forward
- Which of the following is/are assumptions made under the Hardy-Weinberg equilibrium principle? A. Mutations are introduced into the gene pool at a regular frequency. B. New alleles may be introduced to the population by migration. C. Gametes combine at random. D. The fittest individuals in a population are most likely to reproduce. E. Allele frequencies change at random from one generation to the next.arrow_forwardThe biological species concept emphasizes whether populations a. look the same. b. have similar biochemical pathways. c. can have gene flow between them. d. share common ancestry. e. have similar ecological requirements.arrow_forwardIdentify 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_forward
- Explain the type of speciation (allopatric, parapatric, or sympatric) most likely to occur under each of the following conditions: A. A pregnant female rat is transported by an ocean liner to a new continent. B. A meadow containing several species of grasses is exposed to a pesticide that promotes nondisjunction. C. In a very large lake containing several species of fish, the water level gradually falls over the course of several years. Eventually, the large lake becomes subdivided into smaller lakes, some of which are connected by narrow streams.arrow_forwardAlfred Russel Wallace and Charles Darwin argued that evolution by means of natural selection involves all of the following steps except: a. variation is present in all species b. species can produce more offspring than the environment can sustain c. all individuals within a species have equal chances to improve their fitness d. those individuals that are more fit will survive and reproduce in the greatest numbers e. over time, the species will evolve as the more fit individuals replace the less fit individualsarrow_forwardWhich of the following examples refers to microevolution? A.In a population of mice, individuals with dark fur are cryptic against the dark soil in their habitat and have higher fitness. Many generations later, the proportion of the population with the allele for dark fur has increased B. Two populations of the same species are reproductively isolated (no allels/individual , moving between the populations) Over many generations they become so different that they diverge into separate species C.In a population of lizards, a random event causes one allele to be lost from the population. So, future generations have a lower proportion (zero) of that alele.arrow_forward
- For each of the following indicate whether it is true of "A" Allopatric Speciation, "S" Sympatric Speciation, "B" Both allopatric and sympatric speciation, or "N" neither allopatric nor sympatric speciation. a. Involves the isolation of a sub-population as a result of a geographical barrier. b. Involves the reduction or elimination of gene flow between sub-populations. c. May occur rapidly (in a single generation) due to non-disjunction. d. Is enhanced by frequent random mating among sub-populations. e. May be initiated by differential habitat preference among members of a large population.arrow_forwardWhich of these is an example of allopatric speciation? Two species of finches that have differing mating calls. B Two species of beetle that live in different levels of the rainforest canopy. The inability of the chromosomes of plant species A to line up with plant species B. D) Two species of lobsters in the Atlantic and Pacific Oceans separated by Central America.arrow_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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