Which of the following white blood cells kill
cancerous body cells?
a. cytotoxic T cells
b. B lymphocytes
c. natural killer lymphocytes
d. mast cells
e. more than one of these white blood cells
kill cancerous body cells
E
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The most important chromosomal mutations are those that affect the:
A. centromere. B. telomere. C. long arm. D. short arm. E. none of these
At the end of meiosis I
A. cells are haploid. B. cells are diploid. C. sister chromatids are in separate cells. D. the homologous pairs are in separate cells. E. the cells are haploid and the homologous pairs are in separate cells.
Which of the following is different from the other
four? a. nondisjunction b. duplication c. inversion d. deletion e. translocation
Charles Darwin did research on
a. dwarf pea plants. b. coleoptiles and phototropism. c. flowering. d. germination. e. fruit ripening.