Evolution 2

The fossil record help scientists

• better understand the kinds of organisms that lived in the past

• better understand how the environment has changed over time

• better understand how organisms have evolved over time

• all of the above

Which of the following are homologous structures?

• whale flipper and bat wing

• legs on a beetle and legs on a cat

Genetic drift is change in the allele frequency of a population due to...

• random chance
• natural selection
• non-random mating (sexual selection)
• artificial selection

A change in a gene, group of genes or chromosome that results in a change in the proteins

• Replication

• Mutations

• Translation

• Transcription

A forest fire ignites in the Sam Houston State Forest and kills many members of a population of pigmy rattlesnakes.

• Gene Flow

• Genetic Drift

Select the best answer based on the image.

• Gene Flow

• Genetic Drift

What happened to the peppered moth population after the Industrial Revolution?

• There were MORE LIGHT moths because the bird couldn't see them on the DARK TREES

• There were MORE DARK moths because the bird couldn't see them on the DARK TREES

• There were MORE DARK moths because the bird couldn't see them on the LIGHT TREES

What is natural selection?

• When reproduction occurs and mutations happen.

• When a offspring has the traits from its parents.

• When an organism is able to camoflauge in its environment.

• the process whereby organisms that are better adapted to their environment tend to survive and reproduce more offspring.

A physical trait favored by an environmental change can be called an

• adaptation

• extinction

• possibility

• mutation

Which statement is true comparing natural selection and artificial selection?

• In natural selection, traits benefit humans and in artificial selection, the traits benefit the species

• In natural selection, traits benefit the species and in artificial selection, the traits benefit humans

• In natural and artificial selection, the process takes hundreds of years to occur

• In natural and artificial selection, nature determines what traits will be passed down to offspring.