The Interactions Between the American Chestnut and the Parasitic Fungus

question 1

Multiple Choice

The interactions between the American chestnut and the parasitic fungus Cryphonectria parasitica best exemplify the principle that

• A) parasites can drive host populations to extinction.
• B) parasites can influence host population cycles.
• C) selection can favor a diversity of host and parasite genotypes.
• D) vaccination can reduce the incidence of disease.

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Definitions:

Epidermis

The outermost layer of the skin that provides a waterproof barrier and creates our skin tone.

Dermis

A dense layer of vital tissue beneath the outer skin, known as the true skin, which houses sweat glands, hair follicles, and connective tissue.

Epidermis

This layer, sitting at the exterior of the skin, acts as a waterproof barrier and dictates the hue of our skin.

Subcutaneous Tissue

Subcutaneous tissue, also known as hypodermis, is the innermost layer of skin composed of fat and connective tissues, providing insulation and energy storage.