T cells
A) mature in the bone marrow.
B) circulate in low numbers in the blood.
C) produce antibodies.
D) function in helping other immune cells.
Ans: D) function in helping other immune cells.
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Because of its location in the electron transfer
chain, delivery of electrons to each FAD results in __________ ATPs. a. 4 b. 2 c. 3 d. 32 e. 0
Which of the following statements is NOT true according to Mendel's law of segregation?
A. Each gamete contains one copy of each factor. B. One factor must be dominant and one factor recessive in each individual. C. Fertilization restores the presence of two factors. D. Factors separate from each other during gamete formation. E. Each individual contains two factors for each trait.
Multicellular organisms probably arose first about 1 billion years ago, resulting in a burst of diversification of organisms and their movement onto land.
a. true b. false
The genes of Ensatina eschscholtzii should be more similar to the genes of Ensatina xanthoptica than they are to the genes of Ensantina klauberi.
a. true b. false