CC2 Natural Selection & Adaptations CC Cooper

Frogs (and other organisms) of the same species can...

• breed with each other.

• eat each other.

• pass down DNA to offspring.

• have a variety of traits within individuals or a population.

Why do the darker frogs have a better chance of surviving than the lighter frogs in this example?

• They are poisonous so they don't get eaten.

• They are faster.

• They blend in better with the environment.

• They are harder for predators to see.

The determining factor for fitness is...

• the number of years they live.

• the amount of food they eat.

• the amount of weight they gain.

• the number of offspring produced.

True or False;

In this example, over a long time, there will still be the lighter frogs in the population because they don't all get eaten.

• True

• False

Natural selection is the cause  of

• evolution

• adaptation

• mutations

• time

Natural selection is

• evolution

• survival of the most fit

• a mechanism of evolution

What does it mean to "have more fitness"?

• to be able to reproduce successfully

• to be a darker frog

• be a stronger and more agressive animal

Can an individual organism change its at will phenotype to be better adapted to its environment?

• No

• Yes

Mutations and variations are completely

• random

• friendly

• predictable

• negative

If the mutation is negative it will result in the lack of

• observations

• motivation

• offspring

• mutations