Use the Following to Answer Questions

question 78

Multiple Choice

Use the following to answer questions :
Suppose a rodent species can either live alone or in groups.Group living affects the chances that the rodents will acquire parasites,susceptibility to predation,and also affects thermoregulation.Three different populations of marmots are affected by group living in different ways-the chart below shows the benefits (positive numbers) and costs (negative numbers) for each of these factors in the three populations where the benefits and the costs are in the same units for each of the factors.
-In which populations would you expect to find group living?

• A) Population A only
• B) Population B only
• C) Population C only
• D) Populations A and B
• E) Populations A and C

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Definitions:

Growth Hormone

A hormone secreted by the anterior pituitary gland that stimulates growth, cell reproduction, and cell regeneration.

Gigantism

A condition characterized by excessive growth and height significantly above average, due to an overproduction of growth hormone in childhood.

Antidiuretic Hormone

A hormone released by the pituitary gland that regulates water balance by reducing urine production and increasing water reabsorption by the kidneys.

Posterior Pituitary

The rear portion of the pituitary gland, responsible for the storage and release of antidiuretic hormone (ADH) and oxytocin, which play roles in water balance and childbirth respectively.