Stage Theories Describe

question 7

Multiple Choice

Stage theories describe

• A) qualitative changes.
• B) long-term changes.
• C) significant changes.
• D) physiological changes.

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Definitions:

Acrosomal Enzymes

Enzymes contained in the acrosome of a sperm cell, which help the sperm penetrate the egg during fertilization.

Sperm-resistant Membrane

A barrier that prevents sperm from penetrating and fertilizing an egg, contributing to contraceptive strategies or infertility.

Gastrulation

Process in embryonic development during which the three germ layers (ectoderm, mesoderm, and endoderm) form.

Blastula

An early stage of embryonic development in animals, characterized by a spherical layer of cells (blastomeres) surrounding a fluid-filled cavity (blastocoel).