Using the Symbols +, −, and 0 to Indicate Interspecific

question 47

Multiple Choice

Using the symbols +, −, and 0 to indicate interspecific species interactions, where the first symbol refers to the first organism mentioned, what interactions exist between mycorrhizae and evergreen tree roots?

• A) +/+
• B) +/0
• C) +/−
• D) 0/0

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Definitions:

Scalp

The scalp is the anatomical area bordered by the face at the front, and by the neck at the sides and back, comprised of five layers and containing hair follicles and sebaceous glands.

Skin

The largest organ of the body that acts as a barrier protecting against physical, thermal, and chemical injury, and pathogens.

Olfactory Nerves

The first pair of cranial nerves, responsible for the sense of smell.

Trochlear Nerves

The fourth pair of cranial nerves, responsible for eye movement, particularly the superior oblique muscle's function which controls downward and inward eye movement.