By Growing on the Trunk or Branch of a Tree,a

question 23

Multiple Choice

By growing on the trunk or branch of a tree,a lichen gains height and exposure to sunlight for photosynthesis.The tree is not harmed by the lichen but does not benefit either.The relationship between the lichen and the tree is

• A) commensalism.
• B) mutualism.
• C) parasitism.
• D) interference competition.

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Definitions:

Environmental Determinants

Factors in the environment that influence health, behavior, and quality of life in both positive and negative ways.

Behavioral Approach

A psychological perspective emphasizing the study of observable behaviors and the roles of learning and environment in shaping behavior.

Observable Behavioral Responses

Measurable actions or reactions of an individual in response to external or internal stimuli.

Social Anxiety

A chronic mental health condition characterized by intense fear and avoidance of social situations due to feelings of embarrassment, self-consciousness, and concern about being judged by others.