Evolution part 1 Review

Bees drink nectar from flowers and move from flower population to flower population. As they move, they carry pollen and pollinate flowers. This is an example of

• nonrandom mating

• genetic drift

• gene flow

• mutation

• natural selection

A small population of birds had some members with blue tails and some members with purple tails. After a devastating hurricane, only the birds with purple tails remained. This is an example of

• nonrandom mating

• genetic drift

• gene flow

• mutation

• natural selection

Mountain goat males will fight each other for territory. Females will mate with the winning males. This is an example of

• nonrandom mating

• genetic drift

• gene flow

• mutation

• natural selection

A population of squirrels had variation of fur from gray to brown. The gray squirrels were easier to see in the pine trees than the brown squirrels and were eaten more often by predators. This is an example of

• nonrandom mating

• genetic drift

• gene flow

• mutation

• natural selection

A snowshoe rabbit was born with thicker fur than its brothers and sisters. This is an example of

• nonrandom mating

• genetic drift

• gene flow

• mutation

• natural selection

In elephants, survival of newborn babies is highest when the baby is an average weight. If the baby is too big or the baby is too small, it is less likely to survive. This is an example of

• directional selection

• stabilizing selection

• disruptive selection

In a species of lizard, tails range from 10 cm to 20 cm. After a change in the environment, the lizards with 18-20 cm tails were more likely to survive and reproduce. This is an example of

• Directional selection

• Stabilizing selection

• Disruptive selection

In a species of birds, beaks range in size from small to large. After a drought, only small seeds and large seeds, the favorite foods of these birds, survived. The smallest beak birds and the largest beak birds survived but the medium beak birds did not. This is an example of

• Directional selection

• Stabilizing selection

• Disruptive selection

Two populations of squirrels is divided by a mountain range and no longer interact or share genes. This is an example of

• Geographic isolation

• Mechanical isolation

• Behavioral isolation

• Temporal isolation

• Habitat isolation

A population of orchid flowers releases pollen in May while another population of orchid flowers releases pollen in July. This is an example of

• Geographic isolation

• Mechanical isolation

• Behavioral isolation

• Temporal isolation

• Habitat isolation