CFA 3-Grade 7

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

• genes.
• variations.
• traits.
• theories.

Dawn observed several different types of finches.  Why are there so many different types?

• Finches live in different places, but eat the same food.
• Finches live in the same place, but eat different types of food.
• Finches live in different habitats and eat different types of food.
• Finches are found all over the world.

Behavioral changes of individuals of a species that allow for better survival. (Acquired traits)

• Variation
• Adaptation
• Behavior
• Environment

Where the better adapted organisms survive to pass traits along to offspring.

• Evolution
• Natural Selection
• Extinction
• Artifical 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 trait is an acquired phenotype.

Do organisms "decide" to evolve and change?

• Yes, they know they need to change to survive 
• No, they change because of natural selection

If a new trait DOES help an organism survive, what may happen to it?

• It dies and its DNA is not passed on

• It survives and its DNA is passed on

• It changes its traits to adapt and survive

Animals and plants can choose to adapt to their environment and the effects of natural selection can usually be seen in a very short time.

• True

• False

Before the industrial revolution the birds were eating more black moths. After the industrial revolution the birds started eating more white moths. Why

• The birds thought the white moths tasted better.

• There were not any black moths to eat

• The white moths stood out on the dark trees so the birds could see them easier.

Which of the following is an environmental pressure that might affect the survival of a species?

• Predators

• Seasonal Changes

• Disease

• All of the Above