Flatworms Differ from Nematodes in That Flatworms

question 57

Multiple Choice

Flatworms differ from nematodes in that flatworms

• A) are radially symmetrical, whereas nematodes are bilaterally symmetrical.
• B) lack a cuticle, whereas nematodes secrete a cuticle that they molt.
• C) have two embryonic cell layers, whereas nematodes have three.
• D) have two openings to the digestive cavity, whereas some nematodes lack a digestive tract.
• E) lack an anterior brain, whereas nematodes have a small anterior brain.

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Definitions:

Repression

Keeping the unconscious from consciousness by pushing it away.

Moving Against

Gaining control in a competitive world through exploitativeness and aggressiveness.

Moving Toward

Connecting with others as a way of dealing with anxiety.

Moving Away

Trying to find peace by avoiding others and escaping conflict.