Echinoderms Differ from Mollusks in Their

question 11

Multiple Choice

Echinoderms differ from mollusks in their

• A) Dominant radial symmetry
• B) Lack of three tissue layers
• C) Lack of a calcium carbonate skeleton
• D) All of the above

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Definitions:

Hardy Weinberg Principle

A principle that describes how allele and genotype frequencies in a population remain constant from generation to generation in the absence of evolutionary influences.

Antigens

Substances that are recognized by the immune system and can provoke an immune response, typically proteins or polysaccharides found on pathogens.

Dominant Allele

An allele that expresses its phenotype even in the presence of another (recessive) allele.

Hardy-Weinberg Equilibrium

A principle stating that genetic variation in a population will remain constant from one generation to the next in the absence of disturbing factors.