Natural Selection Assessment Review

Front

Which statement about the traits of individuals in a species is generally true?

Back

Nearly all traits in a species have variation.

Front

Which explanation does NOT fit how island iguanas became larger? Options: there was always variation in iguana populations some were larger and some smaller, iguanas that were larger had an advantage on the island, because they were less often hunted by cats, individual iguanas changed themselves to become larger so they wouldn’t be eaten by cats, larger iguanas survived and reproduced more often, so the average size of the iguanas on the island slowly got larger.

Back

individual iguanas changed themselves to become larger so they wouldn’t be eaten by cats.

Front

What change was observed in the Galapagos finches? Options: Small beak birds grew their beaks larger, Large beak birds killed smaller beaked birds, Large beak birds survived more often than small beak birds, Dark birds survived more often than light birds.

Back

Large beak birds survived more often than small beak birds.

Front

What was the major cause for the beak size change in the population of finches we studied?

Back

their food source changed

Front

What might happen to light-colored mice if a nearby volcano spewed ash into the air and turned all of the sand black?

Back

The mice might all die off, since they now have no way to hide from predators

Front

What is most likely to happen to moth populations in the picture shown? Options: Light moths--hunted easily, dark moths--population increase; Dark moths--hunted easily, dark moths--population increase; Light moths--hunted easily, light moths--population increase; Lights moths will change their color to match dark moths.

Back

Light moths--hunted easily, dark moths--population increase

Front

Does natural selection occur during the lifetime of a single organism?

Back

False

Front

Adaptations can be:

camouflage

,

ability to survive cold weather

,

hunting skills

,

all of the above

Back

all of the above

Front

TRUE or FALSE: Natural selection will still occur if individuals are exactly the same.

Back

FALSE

Front

How do you "win" at natural selection?

Back

survive & reproduce