In a species of mice, short hair is dominant to long hair. If a short-haired individual is crossed with a long-haired individual and both long- and short-haired offspring result, one can conclude that:
A: the short-haired individual is homozygous.
B: the short-haired individual is heterozygous.
C: the long-haired individual is homozygous.
D: the long-haired individual is heterozygous.
E: This cannot be answered without more information.
Answer: B: the short-haired individual is heterozygous.
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Growth hormone is a protein hormone that has effects on a variety of cells, including muscle, where it increases glucose uptake. If you could inject growth hormone molecules directly into muscle cells, what do you expect the effect would be?
A. The effect on glucose uptake would be amplified because a hormone molecule inside the cell is always more effective than one on the surface. B. The injected growth hormone molecules would have no effect on glucose uptake. C. Intracellular injection would decrease glucose uptake by muscle cells. D. Intracellular injection would increase glucose uptake by muscle cells.
Genes code for ______, which determine a eukaryotic organism’s characteristics.
a. plasmids b. blood type c. specific proteins d. chromosomes
Herbivory benefits _____
a. the herbivore c. both the herbivore and the plant b. the plant d. neither the herbivore nor the plant
The word “hormone” comes from the Greek word
meaning a. target. b. response. c. secretion. d. set in motion. e. internal gland.