The Ancestor of the Animal Clade Was Likely a _______

question 36

Multiple Choice

The ancestor of the animal clade was likely a _______ similar to existing _______. Animals probably evolved from this ancestor by _______ of cells.

• A) colonial prokaryote; bacteria; functional specialization
• B) colonial microbial eukaryote; choanoflagellates; functional specialization
• C) colonial microbial eukaryote; dinoflagellates; dedifferentiation
• D) multicellular fungus; fungi; differentiation
• E) multicellular fungus; choanoflagellates; functional specialization

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Definitions:

Behavioral Contrast

A phenomenon where a change in conditions results in an opposite change in behavior, often observed in operant conditioning experiments.

Habituation

A decrease in response to a stimulus after repeated presentations, indicating a form of learning that involves becoming accustomed to the stimulus.

Sensitization

An increase in behavioral response after exposure to a stimulus.

Higher-order Conditioning

A form of conditioning in which a stimulus is paired with a previously conditioned stimulus, leading to the acquisition of the same conditioned response without being directly paired with the unconditioned stimulus.