A Reproductive Difference Between Sea Urchins and Humans Is

question 20

Multiple Choice

A reproductive difference between sea urchins and humans is

• A) the sea urchin egg completes meiosis prior to fertilization, but meiosis in humans is completed after fertilization.
• B) sea urchin eggs are produced by meiosis, but human eggs are produced by mitosis.
• C) sea urchin eggs and sperm are of equal size, but human eggs are much bigger than human sperm.
• D) sea urchins, but not humans, have a need to block polyspermy because only in sea urchins can there be more than one source of sperm to fertilize the eggs.
• E) sea urchin zygotes get their mitochondria from the sperm but human zygotes get their mitochondria from the egg.

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Definitions:

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A motivational theory that identifies four basic drives—the drive to acquire, bond, comprehend, and defend—that govern human behavior.

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Expectancy Theory

A motivation theory that suggests an individual’s behavior is determined by their expected outcomes or rewards following such behavior.

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