If an individual has the genotype BbCC, how many different kinds of gametes can that individual produce?
A. one
B. two
C. three
D. four
B. two
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The carbon cycle revolves around
A. nitrogen. B. water. C. phosphorus. D. carbon dioxide.
Which of the following statements about stem cells is NOT accurate?
A. Stem cells can undergo mitosis. B. Some stem cells can differentiate into more than one type of specialized cell. C. Different types of stem cells vary in their potency. D. Stem cells are only found in embryos. E. Some stem cells can only differentiate into one cell type.
Which statement best describes the difference between cell division in plant and animal cells?
a. Cytokinesis occurs by formation of a cleavage furrow in animal cells, but not plant cells. b. Cytokinesis occurs by formation of a cleavage furrow in plant cells, but not animal cells. c. Centrosomes play an important role in spindle formation in plant cells, but not in animal cells. d. Chromosome replication occurs during interphase in animal cells, while in plant cells, replication occurs when the nuclear envelope disintegrates. e. Animal cells divide via the cell cycle whereas plant cells divide by binary fission.
The data in the graph best support which of the following claims?
(A) Environmental contamination elevates total testosterone oxido-reductase activity in females. (B) Environmental contamination reduces total testosterone oxido-reductase activity in females. (C) Environmental contamination elevates total testosterone oxido-reductase activity in males. (D) Environmental contamination reduces total testosterone oxido-reductase activity in males.