5b (5.4)

Multiple Choice

Why was the idea of the fixity of species significant in the context of Darwin's time?

• It supported the belief that species could change rapidly.

• It challenged the prevailing scientific views of the era.

• It suggested that species do not change over time, which was widely accepted.

• It was based on genetic evidence.

Multiple Choice

What was one of the key observations Darwin made that contributed to his theory of natural selection?

• He observed differences among animals in different locations.

• He discovered DNA.

• He invented the microscope.

• He proved all species are identical.

Multiple Select

Which of the following are main points of Darwin’s theory of natural selection?

• More young are born than can survive in every species.

• Individuals compete for resources needed to survive.

• All individuals in a species survive equally well.

• Individuals do not pass on their traits.

Fill in the Blanks

The process in which individuals with traits better suited to their environment survive and reproduce is sometimes called survival of the

.

Multiple Choice

According to scientists after Darwin’s time, what is necessary for traits to be passed from one generation to the next?

• Genes and DNA must change.

• All individuals must survive.

• Organisms must migrate.

• All traits must remain the same.

Fill in the Blanks

A mutation is a random change in

.

Fill in the Blanks

The modern synthesis blends

and natural selection in the modern model of evolution.