Most amphibians are completely dependent on an aquatic environment for ____
a. respiration
b. feeding
c. reproduction
d. movement
e. thermoregulation
ANSWER: c
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The term "biotech barnyards" refers to
a. the production of human products by farm animals. b. the development of new species of farm animals. c. the increased production of milk, egg, wool, etc. d. modern methods of raising more animals on less feed. e. the creation of transgenic animals that can produce several products
A color-blind man and a woman with normal vision
whose father was color blind have a son. Color blindness, in this case, is caused by an X-linked recessive gene. If only the male offspring are considered, the probability that their son is color blind is a. 0.25 (or 25%). b. 0.50 (or 50%). c. 0.75 (or 75%). d. 1.00 (or 100%). e. none of these.
Fertilization is completed when the sperm nucleus fuses with the ________
Fill in the blank(s) with correct word
In invertebrates with open circulatory systems, hemolymph is composed of:
A. interstitial fluid. B. plasma plus interstitial fluid. C. plasma plus intracellular fluid. D. plasma.