During the Course of the Formation of a Parasite/host Relationship

question 17

Multiple Choice

During the course of the formation of a parasite/host relationship, a critical first step in this evolution would be

• A)changing the behavior of the host or intermediate host.
• B)developing asexual reproduction.
• C)deriving nourishment without killing the host.
• D)starting as an ectoparasite and then later becoming an endoparasite.
• E)utilizing both heterotropic and autotrophic nutrition during dormancy.

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Definitions:

Unconditioned Stimulus

in behavioral psychology, a stimulus that naturally and automatically triggers a response without the need for prior learning.

Conditioned Stimulus

A previously neutral stimulus that, after becoming associated with an unconditioned stimulus, eventually triggers a conditioned response.

Conditioned Response

A learned response to a previously neutral stimulus that has been repeatedly associated with an unconditioned stimulus.

Unconditioned Response

An automatic and innate reaction to a stimulus, not learned through prior experience.