What Was an Early Selective Advantage of a Coelom in Animals

question 2

Multiple Choice

What was an early selective advantage of a coelom in animals? A coelom ________.

• A) contributed to a hydrostatic skeleton, allowing greater range of motion
• B) was a more efficient digestive system
• C) allowed cephalization and the formation of a cerebral ganglion
• D) allowed asexual and sexual reproduction

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Definitions:

Sarcolemma

Plasma membrane of a muscle fiber; also forms the tubules of the T system involved in muscular contraction.

Plasma Membrane

The lipid bilayer that surrounds a cell, regulating the passage of substances in and out of the cell.

Muscle Fiber

A single muscle cell, typically long and cylindrical, which contracts to produce movement.

ATP

Adenosine triphosphate, a molecule that carries energy within cells, used as a direct source of energy for many cellular processes.