Why Do Animals in Deep Ocean Depths Live in Complete

question 107

Multiple Choice

Why do animals in deep ocean depths live in complete darkness?

• A) because 100% of the ocean is at a depth where no light penetrates
• B) because over 90% of the ocean is at a depth where no light penetrates
• C) because over 80% of the ocean is at a depth where no light penetrates
• D) because over 70% of the ocean is at a depth where no light penetrates

---

Definitions:

Convulsions

Involuntary, rapid contractions of muscles which can be a symptom of various medical conditions, including epilepsy and fever.

Epinephrine

A hormone and neurotransmitter also known as adrenaline, which increases heart rate, contracts blood vessels, dilates air passages, and participates in the fight-or-flight response.

Blood Pressure

The pressure of circulating blood on the walls of blood vessels, essential for the circulatory system's functioning.

Appetite

The natural desire to satisfy bodily needs, especially for food.