Which of the Following Statements About Blocks to Polyspermy in Sea

question 40

Multiple Choice

Which of the following statements about blocks to polyspermy in sea urchins is false?

• A) Blocks to polyspermy are triggered by fusion of the plasma membranes of the sperm and egg and entry of the sperm into the egg.
• B) Blocks to polyspermy prevent more than one sperm from entering an egg.
• C) The fast block causes release of the acrosomal enzymes.
• D) The fast block results from a change in electric-charge difference across the plasma membrane of the egg.
• E) The slow block results from the release of calcium.

Analyze the direction (upward or downward) in which a parabola opens.

Graph quadratic functions accurately.

Write the equation of a parabola given specific conditions.

Determine the intercepts of quadratic functions.

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