Unit 7 Pretest

Front

What is Variation?

Back

Variation refers to the differences in physical traits among individuals of the same species. It is essential for natural selection as it provides the raw material for evolution.

Front

What is a Homologous Structure?

Back

A homologous structure is a biological feature in different species that has a similar form but serves different functions, indicating a common ancestry.

Front

What is Gene Flow?

Back

Gene flow is the transfer of genetic material between populations, often occurring when individuals from one population breed with individuals from another.

Front

What causes Variation within a Population?

Back

Mutation is the primary cause of variation within a population, introducing new genetic material and traits.

Front

Which moth will be more successful in a soot-covered environment?

Back

The dark moth will be more successful in a soot-covered environment due to better camouflage from predators.

Front

What is Natural Selection?

Back

Natural selection is the process by which organisms better adapted to their environment tend to survive and produce more offspring.

Front

What is Adaptation?

Back

Adaptation is a trait that helps an organism survive and reproduce in its environment, often resulting from natural selection.

Front

What are Analogous Structures?

Back

Analogous structures are body parts in different species that have similar functions but do not share a common ancestry.

Front

What is a Vestigial Structure?

Back

A vestigial structure is a body part that has lost its original function through evolution, such as the human appendix.

Front

What is Mutation?

Back

Mutation is a change in the DNA sequence of an organism, which can lead to new traits and variations in a population.