In a hypothetical environment, fishes called pike-cichlids are visual predators of algae-eating fish (in other words, they locate their prey by sight). If a population of algae-eaters experiences predation pressure from pike-cichlids, which of the following is least likely to be observed in the algae-eater population over the course of many generations?
A) selection for drab coloration of the algae-eaters
B) selection for nocturnal algae-eaters (active only at night)
C) selection for larger female algae-eaters, bearing broods composed of more, and larger, young
D) selection for algae-eaters that become sexually mature at smaller overall body sizes
E) selection for algae-eaters that are faster swimmers
A hypothetical hybrid zone.
Overview of gas exchange between the environment, blood, and cells.
Visual Field Defects
Glaucoma. (a) A buildup of pressure within the eye cavities, often caused by a blockage of vessels t
Primary visual processing areas (blue) in (a) human (lateral and mesial views) and (b) chimpanzee.
The Human Visual Cortex