The Most Ancient Branch Point in Animal Phylogeny Is the Characteristic

question 63

Multiple Choice

The most ancient branch point in animal phylogeny is the characteristic of having ________.

• A) radial or bilateral symmetry
• B) diploblastic or triploblastic embryos
• C) true tissues or no tissues
• D) a body cavity or no body cavity

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Definitions:

Experience-dependent Development

The process by which individual experiences, such as learning, directly influence and shape the development of neural connections and behavior.

Vocal Cords

The folds of tissue in the larynx responsible for producing sound, including speech.

Habituation

The psychological process of gradually becoming accustomed to a stimulus after repeated exposure, leading to a decrease in response.

Classical Conditioning

A learning process in which an innate response to a potent stimulus comes to be elicited in response to a previously neutral stimulus.