Question

While all giraffes are tall they are not all the exact same height. Within a population, the height of each individual giraffe can vary. Scientists observe that over many generations the average height of the giraffe population is increasing. They believe this in response to trees producing fewer leaves on lower branches, meaning the giraffes' main food source is higher up.

What kind of selection is this an example of?

(1 point)
Responses

Directional Selection and Disruptive Selection
Directional Selection and Disruptive Selection

Stabilizing Selection
Stabilizing Selection

Disruptive Selection
Disruptive Selection

Directional Selection

Answer 1

This is an example of **Directional Selection**. This type of selection occurs when individuals with a certain trait (in this case, height) are favored over others, leading to a shift in the population's characteristics in a specific direction (towards taller heights) due to environmental pressures (such as the decreased availability of food at lower levels).