Use the Following Information When Answering the Corresponding Questions)

question 33

Multiple Choice

Use the following information when answering the corresponding questions) .
Martin Wikelski and L. Michael Romero Body size, performance and fitness in Galápagos marine iguanas, Integrative and Comparative Biology 43 [2003]:376- 86) measured the snout- to- vent anus) length of Galápagos marine iguanas and observed the percent survival of different- sized animals. Figure 23.2 shows the log snout- vent length SVL, a measure of overall body size) plotted against the percent survival of these different size classes for males and females.
Figure 23.2
-Examine the figure above. What type of selection for body size appears to be occurring in these marine iguanas?

• A) stabilizing selection
• B) directional selection
• C) sexual selection
• D) disruptive selection

---

Definitions:

Size Constancy

The perceptual understanding that an object's size remains the same despite changes in the distance from which it is observed.

Perceptual Constancy

The brain's ability to recognize that an object's characteristics remain the same despite changes in the sensory input, such as distance or lighting.

Retinal Image

The image of an object that is projected on the retina. Its size increases with the size of that object and decreases with the object’s distance from the eye.

Size Constancy

The perceptual phenomenon where the size of an object is perceived to remain constant despite variations in the distance or size of the image it projects on the retina.