Which of the following molecules is responsible for carrying the acetyl group from pyruvate into the citric acid cycle?
a. FADH2
b. ATP
c. CoA
d. NADH
Ans: c. CoA
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From the relative positions of genes on the
chromosome illustration below, we expect a. the highest frequency of crossing over between genes A and D. b. more crossing over between C and D than between A and B. c. more crossing over between A and B than between B and C. d. the lowest frequency of crossing over between B and C. e. none of these.
Pyramids of numbers are of limited usefulness because they:a
do not indicate the biomass of the organisms at a given time. b. do not indicate the gross primary productivity of each species. c. do not include energy flow through the ecosystem. d. include three trophic levels. e. have limited reliability of the actual numbers involved.
Which of the following conditions rise as a consequence of a thinning ozone layer?
A. Increased global temperature B. Increased rain C. Stronger wind D. Air pollution E. Increased rate of skin cancer
What are macrophages, and what are their functions?
What will be an ideal response?