Date of Award:

5-1-1966

Document Type:

Thesis

Degree Name:

Master of Science (MS)

Department:

Biology

Department name when degree awarded

Zoology

Committee Chair(s)

K. L. Dixon

Committee

K. L. Dixon

Committee

J. R. Simmons

Committee

R. T. Sanders

Abstract

The development of sensory organs for the reception of external stimuli has clearly been of importance in the evolution of animal life. In part, through natural selection, these organs have increased in complexity and efficiency to the present level seen in mammals and birds. Differences in the physical nature of the sensory stimuli facilitated the development of specifically different organs, each mode of stimulation being of some importance to the animal; yet the relative importance of these modalities depended and depends on the animal-habitat unit.

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