Which of the following is NOT a characteristic of mammals?
A. They have a two-chambered heart.
B. They are endothermic.
C. They have lungs.
D. They have an amnion.
E. They have a skeletal system composed of bone.
Answer: A. They have a two-chambered heart.
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With regard to photosynthesis,
photorespiration a. is more efficient in producing carbohydrates. b. predominates in C3 plants in cool weather when water is plentiful. c. predominates in C4 plants on hot days. d. produces the same amount of PGA. e. does none of these
The process in which oxygen, not carbon dioxide,
becomes attached to RuBP a. is the Calvin-Benson cycle. b. is the C3 pathway. c. is the C4 pathway. d. does not occur in plants in hot, dry climates. e. is photorespiration.
__________ are proteins, Y-shaped antigen receptors made only by __________ cells.
Fill in the blank(s) with the appropriate word(s).
In the context of phage infection, "induction" means
a. the transition from a lysogenic to a lytic state. b. promotion of the expression of phage genes. c. release of phage particles from a host cell. d. integration of phage DNA into the bacterial chromosome. e. packaging of phage DNA into protein coats.