How Does a Sperm Penetrate an Egg

question 73

Multiple Choice

How does a sperm penetrate an egg?

• A)Enzymes in the acrosome dissolve the zona pellucida.
• B)The sperm melts its way inside,using the nucleic acids in its DNA.
• C)The forward pressure of the flagellum forces it through the plasma membrane.
• D)Spermatids are wedge-shaped and are chemically attracted to the inside cytoplasm of the egg cell.
• E)The haploid sets of chromosomes match across the membrane and this triggers the membrane to dissolve.

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Definitions:

Variable Costs

Expenses that fluctuate with the level of output or business activity.

Fixed Manufacturing Overhead

The portion of total manufacturing overhead costs that remains constant regardless of the level of production, such as factory rent or salaries of permanent staff.

Direct Materials

Ingredients or substances that are directly linked to the manufacturing of a particular item.

Relevant Range

The range of activity within which the assumptions about variable and fixed cost behavior are valid for the purposes of cost estimation and budgeting.