Biology End of Course Exam

The cell spends most of it's life in ________________.

• mitosis

• cytokinesis

• Interphase

• None of the above

What role does mutation play in evolution?

• It decreases genetic variation

• It is the only source of new alleles

• It prevents adaptation

• It ensures that all individuals are identical

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Why is genetic diversity important within a species?

• It decreases the species' ability to adapt to environmental changes

• It ensures that all individuals are genetically identical

• It increases the species' potential to adapt to environmental changes

• It makes the species more susceptible to diseases

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Which of the following is NOT a mechanism of evolution?

• Natural selection

• Genetic drift

• Artificial selection

• Cloning

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What is an adaptation?

• A temporary change in an organism's behavior

• A genetic trait that improves an organism's ability to survive and reproduce

• The process by which a species splits into two or more species

• A random change in the DNA of an organism

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What is the main chemical compound that stores and releases energy?

• ATP

• Cytoplasm

• PTP

• Oxygen

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Which of the following mechanisms is primarily responsible for the introduction of new alleles into a population's gene pool?

• Genetic drift

• Gene flow

• Natural selection

• Mutation

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What is the molecule called that carries genetic information?

• Protein

• Carbohydrate

• DNA

• Lipid

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How many pairs of chromosomes do humans typically have?

• 23

• 46

• 12

• 92

What is the phenotype ratio of a dihybrid cross (AaBb x AaBb) assuming complete dominance?

• 9:3:3:1

• 3:1

• 1:2:1

• 1:1:1:1