IB Biology Evolution

What is evolution?

• A measure of the relative survival success of an individual.

• A physical, acquired change that is passed on to offspring.

• A cumulative change in populations' genetic characteristics

• A random change in alleles from generation to generation.

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A group of species that share a common ancestor is called?

• Phylum

• Taxonomy

• Homologous Trait

• Clade

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What is accepted by scientists as evidence of evolution?

• I only

• I and II only

• I and III only

• I, II and III

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Humans use their pelvis and femur to walk. In whales, pelvis and femur are.....

• Vestigial Structures

• Analogous Structures

• Mutations

• Acquired Traits

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Analogous structures are similar because.....

• Common Ancestry

• Identical Appearance

• Similar Use

• Artificial Selection

Why is the mouse population changing over time?

• The light mice can reproduce more successfully than the dark mice

• The hawks eat more dark mice than light mice because the dark mice taste better

• The hawks eat more light mice than dark mice because they can see the light mice more easily

• The hawks eat more dark mice than light mice because they can see the dark mice more easily

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Where do adaptations come from?

• The individual organism decides to adapt

• Mutations that give an organism an advantage in its environment

• Genetic recombination during meiosis

• Both mutations and genetic recombination are sources of adaptation

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Which of the following best describes natural selection?

• A process where organisms better adapted to their environment tend to survive and produce more offspring

• A random change in the DNA sequence

• The movement of individuals into or out of a population

• The intentional breeding of organisms for certain traits

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What is the primary source of genetic variation in a population?

• Mutations

• Natural selection

• Genetic drift

• Gene flow

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Which of the following is an example of homologous structures?

• The wings of a bat and the wings of a butterfly

• The flippers of a whale and the wings of a bird

• The forelimbs of a human and the forelimbs of a cat

• The eyes of a human and the eyes of an octopus

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