ATP hydrolysis directly powers the movement of _____
A) K+ out of cells
B) Na+ out of cells
C) Na+ into cells
D) Ca++ into cells
E) Cl- into cells
Answer: B
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Which of the following is TRUE of both T cells and B cells?
A. They have class I MHC molecules on their cell surface. B. They recognize specific antigens on the cell surface. C. They are involved in the humoral immune response. D. They are lymphocytes. E. All of the responses are correct.
Explain horizontal gene transfer and demonstrate how this phenomenon has complicated evolutionary studies using a diagram that illustrates phylogenetic relationships between organisms and genes
What will be an ideal response?
The ____ forms the skeleton of invertebrate chordates
a. pharynx b. neural crest c. oral hood d. notochord e. cranium
The Hardy-Weinberg principle is applicable provided:a
matings between individuals are nonrandom. b. matings between families occur preferentially. c. matings between individuals of different genotypes occur preferentially. d. matings between individuals are random. e. matings between individuals of the same genotypes occur preferentially.