The fundamental time unit representing a major change in life forms is the
A) eon subdivision.
B) era subdivision.
C) period subdivision.
D) epoch subdivision.
Answer: C
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Whiskers have one _________dislocation up the center of the whisker.
Fill in the blank(s) with the appropriate word(s).
Glaucoma occurs because
a. the eye cannot accommodate properly. b. the shape or size of the eye is not normal. c. there is too much pressure in the fluid in the eyeball. d. the lens is partially or totally opaque.
C 3 plants are more efficient at conversion of sunlight to plant matter than C4 plants
What will be an ideal response?
The universe formed Helium nuclei in a process called nucleosynthesis. At that time, what fraction of the mass was converted to Helium nuclei (2 protons and 2 neutrons)?
A. 2 percent B. 50 percent C. 25 percent D. 99 percent E. 1 percent