Unit 7 Test Review

Change in allele frequencies over time resulting in new species developing from existing ones.

• Evolution

• Adaptation

• Natural Selection

• Variation

A behavior or trait that helps an organism survive and reproduce in its environment.

• Evolution

• Adaptation

• Natural Selection

• Variation

As a result of natural selection which moth phenotype became more common in industrial England?

• Zebra

• Speckled

• Black

• White

Which of the following is a principle of evolution by natural selection?

• Organisms produce more offspring than can survive

• There is variation among individuals in a population

• Variation is heritable from parents to offspring

• All of the above

Natural selection results in what?

• Variations in allele frequencies due to selective pressures

• Some organisms surviving better in an environment

• Survival of the fittest

• All of the above

Group of organisms of the same species inhabiting an area and sharing a gene pool.

• Ecosystem

• Community

• Migration

• Population

Which of the following statements concerning genetic drift is FALSE?

• it causes steady, directed change to allele frequency

• it causes a change in allele frequency due to chance events

• it may result from natural disaster

• it may cause gene variants to disappear completely

A group of similar organisms that are capable of mating and producing fertile offspring.

• Population

• Community

• Ecosystem

• Species

A/an __________________ is a physical or behavioral trait that prevents a member of one species from mating with a member of another species and producing fertile offspring.

• Geographic isolation

• Isolating mechanism

• Reproductive isolation

• Mutation

What do the branches in a cladogram represent?

• Relative dating

• Branches on trees

• Speciation events

• New traits in an organism