Theories of Evolution

1. Which of the following statements about biological species is (are) correct?

I. Biological species is a group of individuals whose members interbreed with one another.

II. Biological species are the model used for grouping extinct forms of life.

III. Members of biological species produce viable, fertile offspring’s.

• I only

• II only

• I and III

• II and III

• I, II, and III

The following isolating mechanisms prevent fertilization and formation of zygote except

• Temporal isolation

• Hybrid breakdown

• Gametic isolation

• Ecological isolation

• Behavioral isolation

Natural selection results in change in a population's _____________ traits over time.

• inherited

• acquired

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A phenotype that improves an organism’s chance of survival in their environment is considered a(n) ____________.

• natural selection

• adaption

• speciation

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What is speciation?

• combining of two species to form one with different traits

• Intentional breeding designed to maintain a desired trait

• timing of mating that prevents normal sexual selection

• A population splits and accumulates different genes in the new groups

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Which of the following is NOT an example of natural selection?

• People selectively breeding hamsters for size.

• Insect populations developing resistance to certain pesticides.

• Bacteria becoming resistant to antibiotics.

• Male birds of certain species inheriting colorful feathers that are more attractive to females.

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Darwin’s and Lamarck’s theories of evolution both suggest that ______________

• species are fixed.

• the environment creates favourable characteristics on demand.

• the main mechanism of evolution depends on the use and disuse of certain organs.

• the interaction of organisms with their environment is important in the evolutionary process.

Which does NOT cause genetic variation?

• crossing over in meiosis

• mutations

• acquired traits

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Which of the following must exist in a population before natural selection can act upon that population?

• Genetic variation among individuals

• Variation among individuals caused by environmental

  factors

• Sexual reproduction

• Three of the responses are correct.

• Two of the responses are correct.

Which of the following does not contribute to the study of evolution?

• Population genetics

• Inheritance of acquired characteristics

• Fossil records

• Comparative embryology

• Comparative morphology