Which two triose phosphates are produced during the Calvin cycle and are the starting points for starch and sucrose synthesis?
A) 3-phosphoglycerate and glyceraldehyde-3-phosphate
B) dihydroxyacetone phosphate and glyceraldehyde-3-phosphate
C) ribulose-1,5-bisphosphate and glycerol phosphate
D) dihydroxyacetone phosphate and glycerate-1,3-bisphosphate
E) 3-phosphoglycerate and ribulose-1,5-bisphosphate
B) dihydroxyacetone phosphate and glyceraldehyde-3-phosphate
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Lions in east African safari parks learn to ignore the presence of safari vehicles. This form is learning is
A. compensatory. B. operant. C. cognitive. D. sign stimulus. E. habituation.
In sexual reproduction, two __________ fuse to form a __________
a. gametes; zygote b. eggs; embryo c. sperm; zygote d. gonads; embryo
In this diagram, which of the following numbers represents the actual event of egg activation? 
A. I B. II C. III D. IV E. V
How are internal and external respiration alike?
A. Both involve carbon dioxide diffusing into the body's tissues. B. Both involve carbon dioxide diffusing into the lungs. C. Both involve oxygen diffusing into the lungs. D. Both involve oxygen diffusing into the body's tissues. E. Both involve an exchange of gases.