Some Animals Have No Gills When Young, but Then Develop

question 14

Multiple Choice

Some animals have no gills when young, but then develop gills that grow larger as the animal grows larger. What is the reason for this trend?

• A) The young of these animals are much more active than the adult.
• B) Relative to their volume, the young have more surface area across which they can transport all the oxygen they need.
• C) The young have a higher basal metabolic rate.
• D) Relative to their surface area, the young have more volume in which they can store oxygen for long periods of time.

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Definitions:

Adequate Sleep

A sufficient duration and quality of sleep necessary for optimal health and functioning.

Hypertension

A chronic medical condition in which the blood pressure in the arteries is persistently elevated, leading to health risks such as heart disease.

Heart Disease

A range of conditions affecting the heart and blood vessels, including coronary artery disease, heart attack, congestive heart failure, and others.

Brown Rice

Whole, unrefined rice that retains its nutrient-rich bran and germ layer. It is considered healthier than white rice.