In Figure 23-2, the X points to a
a) guard cell.
b) mesophyll cell.
c) vein.
d) stoma.
Ans: d) stoma.
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Inside an active mitochondrion, most electrons follow which pathway?
A) glycolysis ? NADH ? oxidative phosphorylation ? ATP ? oxygen B) citric acid cycle ? FADH2 ? electron transport chain ? ATP C) electron transport chain ? citric acid cycle ? ATP ? oxygen D) pyruvate ? citric acid cycle ? ATP ? NADH ? oxygen E) citric acid cycle ? NADH ? electron transport chain ? oxygen
Natural selection acts directly on the genotype of an organism
_______ Indicate whether the statement is true or false.
Our genetic information will be decided based on the order of nucleotides (G,C,A,T,) in our DNA.
a. true b. false
The V domain of an immunoglobulin heavy chain is generated by somatic recombination of
a. V, D, and J genes. b. V and C genes. c. V and H genes. d. V and D genes. e. V, C, and H genes.