Natural Selection

Why are advantageous traits more likely to be passed onto offspring?

• Because they are more likely to survive and reproduce.

• Because they come from dominant alleles.

• Because they come from recessive alleles.

• Because the organism knew it needed that trait, survives, and passes it on.

Mutations are a change in what?

• DNA

• tRNA

• protein

• rRNA

"Organisms that are better adapted to the environment survive to pass traits to their offspring" is the definition of

• Natural Selection

• Evolution

• Selective Breeding

• Artificial Selection

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

According to natural selection, light colored tree trunks would favor

• light colored moths

• dark colored moths

• red colored moths

• red and light colored moths

A slight difference in an inherited trait between individual members of the same species. (Example: Some rabbits have white fur and some have black fur.)

• variations

• adapatations

• homologous structures

• analogous structures

Natural selection explains HOW organisms change over time. What is the process in which populations are changed over time?

• Digestion

• Elimination

• Evolution

• Adaptation

Definition: fitness

• ability to survive and reproduce in a specific environment

• organisms with traits well suited to their environment survive and reproduce at a greater rate

• a growing population causes a scarcity of resources

• differences in the DNA sequence

Definition: variation

• ability to survive and reproduce in a specific environment

• organisms with traits well suited to their environment survive and reproduce at a greater rate

• a growing population causes a scarcity of resources

• differences in the DNA sequence

Definition: natural selection

• inherited characteristic that increases chances of survival

• organisms with traits well suited to their environment survive and reproduce at a greater rate

• a growing population causes a scarcity of resources

• differences in the DNA sequence