A joint that consists of two opposed flat surfaces of approximately equal size is a _____ joint
A. plane
B. saddle
C. hinge
D. pivot
E. ellipsoid
A
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If an albino (aa) mates with a person homozygous for normal pigment (AA),
A. there is a 100% probability that the child will have albinism. B. there is a 50% probability that the child will have albinism. C. there is a 100% probability that the child will have normal pigmentation. D. there is a 50% probability that the child will have normal pigmentation.
The intracellular fluid has essentially the same number of positive and negative charges and is therefore electrically ______.
Fill in the blank(s) with correct word.
Eskimos wear a great deal of clothing and have limited exposure to ultraviolet light, but do not suffer from vitamin D deficiency. A possible explanation is
A. they do not require sunlight for vitamin D formation. B. their bodies produce vitamin D another way. C. they do not need vitamin D. D. their exposure to ultraviolet light in the summer will last for a year. E. they get enough vitamin D in their diet of fish and marine mammals.
One ATP molecule is required for
A. formation of the cross-bridge. B. movement of the cross-bridge. C. release of the cross-bridge. D. formation of the cross-bridge and for movement of the cross-bridge. E. formation of the cross-bridge, for movement of the cross-bridge, and for release of the cross-bridge.