The Fossil Record of Echinoderms

question 68

Multiple Choice

The fossil record of echinoderms

• A)is sparse with few representatives.
• B)shows echinoderms were a fairly modern group to arise.
• C)indicates early echinoderms were sessile and pentaradial but had a bilateral ancestor.
• D)suggests early echinoderms were free-swimming and bilateral but became sessile and pentaradial in recent times.
• E)is a clear and detailed history of complex echinoderm evolution.

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Definitions:

Aggregated

Combined or collected into a summary form from separate parts.

Predicting Future Behaviors

The process of using current and past behaviors or trends to forecast future actions or patterns.

Specific Behaviors

Actions or reactions of an individual in response to external or internal stimuli, which can be observed and measured.

Aggregated Behaviors

The sum or collection of individual actions or responses observed over a period of time, providing insights into overall patterns or trends.