What is a species?

• A group of organisms that can mate with each other and produce fertile offspring. 
• A group of organisms that genetically are very different from each other. 
• A group of organisms that can mate and produce offspring even if those offspring are infertile.
• Indivual organisms that live in the same environment. 

The differences among a species, like different color bird feathers, are called

• genes.

• variations.

• traits.

• theories.

Any living thing is called a(n)

• organism

• behavior

• mammal

• creature

Anything you can observe about an organism, including the way it looks and behaves it called a

• trait

• variation

• species

• organism

A dog and cat both have a similar trait-- they have white fur. Are the dog and cat members of the same species?

• Yes, because they have the same trait.

• Yes, because they are both mammals.

• No, because they cannot reproduce fertile offspring.

• Not enough information given.

What type of scientists study living things?

• biologist

• chemist

• physicist

• engineer

It is impossible for organisms of the same species to have variation in traits.

• true

• false