The primate fossil named Lucy was
a. a dryopith.
b. an australopith.
c. a cercopith.
d. a prosimian.
e. none of these.
Answer: b
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Which statement describes the production of offspring by wingless female aphids?
a. Wingless female aphids can produce clones of female offspring by laying eggs. b. When the amount of food available in the environment increases, the number of male offspring increases. c. Wingless female aphids only produce female clones, and these clones are made without the mother laying eggs. d. Different proportions of winged male, non-egg-laying female, and egg-laying female offspring are produced based on the temperature and amount of daylight. e. Environmental conditions do not affect the sexuality of wingless female aphid offspring; sexuality is only determined genetically.
Energy flows in which pattern?
a. Sun ? environment ? consumers ? producers b. Sun ? environment ? producers ? consumers c. Sun ? consumers ? producers ? environment d. Sun ? producers ? consumers ? environment e. Sun? producers ? environment ? consumers
Increases and decreases of the heart rate result from changes in the activity of the _____
A) medulla oblongata B) thalamus C) pituitary D) cerebellum
The primary agents of air pollution that affect exercise performance are ozone and nitrogen.
a. true b. false