Which Statement Describes the Fast Block to Polyspermy

question 88

Multiple Choice

Which statement describes the fast block to polyspermy?

• A)It is more pronounced in invertebrates than in vertebrates.
• B)It occurs within hours after fertilization.
• C)It is mediated by Ca²⁺ ions.
• D)It does not involve a wave of electrical depolarization that spreads over the egg surface.

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Definitions:

Harvest Gypsies

A term historically used to describe itinerant agricultural workers, particularly those who moved from farm to farm during the harvest seasons.

Migrant Farm Workers

Individuals who travel from one location to another, often seasonally, to work in agriculture, usually under temporary contracts and often facing challenging conditions.

Great Depression

A severe worldwide economic downturn that took place mostly during the 1930s.

Upton Sinclair

An American writer and social activist best known for his novel "The Jungle," which exposed the harsh conditions and exploited lives of immigrants in the United States' meatpacking industry, leading to public outrage and regulatory reforms.