Natural Selection amoeba sisters

What are the variations in these frogs?

• Their leg muscles.

• Their skin color.

• Their tongue length. 

Why did the lighter frogs disappear from the image?

• They are better hidden (camouflaged) in this environment.

• They are more visible to predators so they were eaten.

Fitness in the biology sense is best defined by:

• How long the frogs live.

• How strong the frogs are. 

• How many offspring the frogs have.

True or False: Over time, the selection for a trait (dark frog color) could lead to a population who all have this trait.

• True

• False

True or False:  Organisms can choose to have variation.

• True

• False

Traits that have a positive effect on fitness and help organisms survive and reproduce are called:

• adaptations

• mutations

Natural selection explains bacterial resistance to antibiotics because:

• bacteria choose to have resistance to antibiotics in their environments and that improves their fitness.

• bacteria have variation in their traits, and those that are able to survive antibiotics in their environments have improved fitness.

Bacteria can also share their resistance by:

• mating with other bacteria.

• transferring the resistance gene to other bacteria.

True or False:  You should take antibiotics when you have a virus.

• True

• False

True or False:  There are vaccines that protect against bacterial infection.

• True

• False