Which Statement Is Not True About Echinoderms

question 20

Multiple Choice

Which statement is not true about echinoderms?

• A) The exoskeleton is made up of bony tissue.
• B) Gas exchange occurs through gills on the skin.
• C) Larvae are free-swimming and bilaterally symmetrical.
• D) A water vascular system allows the tube feet to produce suction.
• E) Symmetry is radial in the adult, usually with parts in fives or multiples of five.

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Definitions:

Banded Rock

Rock that displays layers or bands of different colors or textures, often resulting from varying mineral compositions or sediment deposition.

Coarse Crystals

Large, visible crystals often found in igneous rocks, indicating slow cooling of magma.

Foliation

Foliation is the repetitive layering in metamorphic rocks, caused by the reorientation of minerals under high pressure and temperature conditions.

Cross Section

A diagram representing the geology as a two-dimensional slice through the land. See also geologic cross section.