BSCS Biology: A Molecular Approach

Chapter 21: Nervous Systems

Evolution of Nervous Systems

1.
The nervous system of the Hydra is called a ____.
A)central nervous system
B)ganglia
C)nerve net
D)peripheral nervous system
2.
Brain size and sophistication, central nervous system control, and increased specialization of function are ___ in vertebrate nervous systems.
A)evolutionary trends
B)disadvantages
C)not usually found
D)deemphasized
3.
The ____ in the brain is the convoluted outer surface, which makes up more than 80% of the total brain mass.
A)medulla oblongata
B)thalamus
C)cerebral cortex
D)cerebellum
4.
Based upon acetylcholine receptors, humans are more closely related to ____.
A)torpedo fish
B)hydra
C)cows
D)frogs
5.
These illustrations show that the cerebellum nerve cells of mammals are ____ than those of reptiles and fish.
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A)more highly branched
B)longer
C)shorter
D)more spread apart
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