You Observe Two Groups of Freshwater Fish That Spawn at the Same

question 54

Multiple Choice

You observe two groups of freshwater fish that spawn at the same time of the year and in the same pond. After females lay their eggs on the pond bottom, males of both species attempt to fertilize them. After some investigation you realize that sperm from both species fertilize the eggs, but embryonic development stops shortly after fertilization when the eggs are fertilized by one species of males, but not by the other. This is an example of _____-zygotic reproductive isolation between the two species.

• A)pre
• B)post

---

Definitions:

Cortisol

A hormone produced by the adrenal glands during stress or when blood-glucose levels are low, belonging to the steroid class.

Cerebral Cortex

The outer layer of neural tissue of the cerebrum in the brain, playing a key role in memory, attention, perception, cognition, awareness, thought, language, and consciousness.

Cerebrum

The Cerebrum is the largest part of the brain, encompassing areas involved in sensory processing, voluntary movements, learning, memory, and complex cognitive processes.

Corpus Callosum

The corpus callosum is a thick band of nerve fibers that divides the cerebral cortex lobes into left and right hemispheres, facilitating communication between the two sides of the brain.