Enteropneusta and Pterobranchia Are Classes of Animals Within the Phylum

question 7

Multiple Choice

Enteropneusta and Pterobranchia are classes of animals within the phylum Hemichordata.All of the following are features relating to reproduction in members of the Hemichordata.Three features listed are either common to members of both classes or occur only in Enteropneusta.Select the one feature that occurs only in Pterobranchia.

• A)External fertilization
• B)Ciliated tornaria larval stage
• C)Asexual budding common
• D)Dioecious with gonads in anterior trunk

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Definitions:

Negative Reinforcement

A behavior reinforcement strategy where the removal of an unfavorable outcome or stimulus increases the likelihood of a behavior being repeated.

Secondary Learning

The process of acquiring knowledge or skills that builds upon or expands from primary learning experiences.

Shaping

A method of positive reinforcement in operant conditioning that rewards closer and closer approximations of the desired behavior.

Successive Approximations

A behavioral training process that breaks down a desired behavior into smaller steps, rewarding closer and closer approximations to the desired behavior.