Lyell's theory of uniformity is the idea that ________
a. None of these answers
b. rapid, sudden changes have changed the Earth
c. gradual, repetitive changes have shaped the Earth
d. lines of descent improve each generation as a result of internal drive by the organism
e. catastrophic geological events have shaped the Earth
c
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The moon lacks life and varies dramatically in temperature. If we could keep a layer of water spread on the surface of the moon, what effect would it have?
A) Physical conditions would remain the same. B) Because water has a high heat of vaporization, the temperatures would rise to the upper extremes. C) The temperatures would drop to the lower extremes. D) Water would absorb and hold heat and moderate the temperature extremes. E) Life would be possible, but it would have to withstand these extremes in temperature.
Which pair is mismatched?
A. Trypanosoma - causes African sleeping sickness B. Trichomonas - sexually transmitted C. Giardia - transmitted by feces in drinking water D. Plasmodium - causes Chagas disease E. Histoplasma - causes Ohio Valley fever
All animals perceive light using different forms of a pigment called retinal
Indicate whether the statement is true or false.
The variation in the type and severity of clinical features of a genetic disorder is called ________________
Fill in the blank(s) with correct word