Natural Selection Sp 1st Block

A group of similar organisms that can mate with each other and produce fertile offspring

• evolution

• species

• variation

Group of organisms all of the same species, living in the same place at the same time.

• gene pool

• population

• species

What members of a species must do for food and other limited resources in order to survive

• compete

• evolution

• share

Organisms with the most beneficial traits will survive. This is commonly known as ___.

• theory of evolution

• variations

• survival of the fittest

What is the advantage of having different shaped beaks?

• To look different from other species.

• To be able to eat the food readily available in the environment.

• To protect itself against predators.

The differences among a species, like different bird beaks, are called

• genes.

• variations.

• traits.

Why is the mouse population changing over time?

• The light mice can reproduce more successfully than the dark mice

• The hawks eat more dark mice than light mice because the dark mice taste better

• The hawks eat more light mice than dark mice because they can see the light mice more easily

The finches of the Galapagos islands different in what way and for what reason?

• size of body, size of trees

• location on specific islands, amount of water

• beak shape, type of food available

Genetic variation can arise from a random change in the DNA of a gene. The change is called a(n)

• mutation

• gene flow

• gene pool

Genetic mutations can be...

• Helpful

• Harmful

• helpful or harmful

Tags

NGSS.MS-LS3-1