The resolution of a light microscope is determined by the equation
a. R = 0.61(?)(NA)
b. R = 0.61(NA) divided by (?)
c. R = 0.61(?) divided by (NA)
d. R = 0.61 divided by (?)(NA)
Ans: c. R = 0.61(?) divided by (NA)
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The probability of producing a normal child by
two parents who are carriers for an autosomal recessive disorder is
a. 50 percent. b. 0 percent. c. 100 percent. d. 25 percent. e. 75 percent
The megaspore produces a plant with _________
nuclei. a. 2 b. 7 c. 8 d. 14 e. 16
Consider the cell cycle of a human cell. During G2, what is the state of the homologous chromosomes?
A. The homologous chromosomes have been pulled to their respective poles by the spindle apparatus. B. The homologous chromosomes have not been replicated yet. C. The homologous chromosomes are lined up on the equator of the cell. D. The homologous chromosomes are now in the haploid or n condition. E. The homologous chromosomes have all been copied through DNA replication and are beginning to condense.
Epithelial tissue is least likely to:
a. contract. b. be specialized as sensory receptors. c. provide protection. d. regulate exchange of substances between parts of the body. e. produce and secrete cell products.