A biomass pyramid illustrates the ____ of all organisms at each trophic level.
A. size
B. number
C. dry weight
D. total weight
E. total utilization of materials
Answer: C
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In the DNA ligase reaction, the lysine residue:
A. serves as the nucleophile displacing the phosphate group 3' to the nicked site. B. serves as the electrophile displacing the phosphate group 3' to the nicked site. C. remains phosphorylated after the ligase reaction. D. serves as a nucleophile, which displaces the pyrophosphate from ATP. E. remains bound to AMP, ready to repeat the reaction.
Which fruit is an aggregate fruit?
a. pea b. maple c. blackberry d. watermelon e. apple
A primary oocyte is indicated by
a. A. b. B. c. C. d. D. e. E.
Which of the following is not a function of meiosis?
a. cause an organism to grow b. create genetic variability c. reduce the chromosome number in gametes d. produce gametes