Refer to the Figure Below

question 108

Multiple Choice

Refer to the figure below. The Cnidaria are simple marine animals that have either of the two basic body plans shown in the figure.You may be familiar with sea anemones, which have the body plan shown on the left, and you are likely familiar with jellyfish, which have the body plan shown on the right.What feature shared by both of these cnidarians could have been important in providing the conditions that enabled the rise of multicellularity on Earth?

• A) Marine habitat
• B) Tentacles
• C) Shared mouth and anus
• D) Separate internal and external layers
• E) Symmetrical body shape

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Definitions:

Temporal Lobe

A region of the cerebrum involved in processing sensory input into derived meanings for the appropriate retention of visual memory, language comprehension, and emotion association.

Limbic System

A complex system of nerves and networks in the brain, involving several areas near the edge of the cortex concerned with instinct and mood.

Efferent Signals

Signals that move away from the central nervous system to the body, instructing muscles to contract or glands to secrete.

Afferent Signals

Signals transmitted from sensory receptors towards the brain or spinal cord.