A Feature of the Earliest Echinoderms Apparently Was Development of Endoskeletal

question 78

Short Answer

A feature of the earliest echinoderms apparently was development of endoskeletal plates with ______________ structure.

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Definitions:

Competent

having the necessary ability, knowledge, or skill to do something successfully.

Clinical Depression

A psychological condition marked by a consistent feeling of sadness or a lack of enjoyment in usual pursuits, leading to a considerable disruption in everyday functioning.

Self-esteem

One's subjective evaluation of their own worth, including feelings of confidence and competence.

Early Sex

Engaging in sexual activities at a younger age than the societal norm or average.