If Gastrulation Was Blocked by an Environmental Toxin, Then ________

question 21

Multiple Choice

If gastrulation was blocked by an environmental toxin, then ________.

• A) cleavage would not occur in the zygote
• B) embryonic germ layers would not form
• C) fertilization would be blocked
• D) the blastula would not be formed
• E) the blastopore would form the mouth

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Definitions:

Abdominopelvic Cavity

A body cavity consisting of two connected spaces, the abdominal cavity and the pelvic cavity, housing major organs of digestion, reproduction, and excretion.

Thoracic Cavity

The chamber of the human body located between the neck and the abdomen, encased by the ribs, sternum, and vertebral column; it contains the lungs and heart.

Serous Membrane

A thin layer of tissue that lines certain internal cavities of the body, producing a lubricating fluid to reduce friction from muscle movement.

Hypothalamus

The hypothalamus is a small but crucial part of the brain that regulates many bodily functions, including temperature, hunger, and hormone release.