Strictly speaking, mitosis is a division of the
a. nucleus.
b. cytoplasm.
c. chromosomes.
d. nucleus and chromosomes.
e. nucleus, cytoplasm, and chromosomes.
Answer: d
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The adrenal medulla produces
a. mineralocorticoids. b. epinephrine. c. cortisol. d. testosterone. e. glucocorticoids
If a man expresses an X-linked recessive trait, his ____________________ was either homozygous or heterozygous
for the trait. Fill in the blank(s) with the appropriate word(s).
What is considered to be the average natural mutation rate that occurs during DNA replication?
a. One in every million nucleotides replicated. b. One in every trillion nucleotides replicated. c. One in every billion nucleotides replicated. d. One in every ten thousand nucleotides replicated.
The smallest and most significant taxon is
A. family. B. kingdom. C. species. D. phylum. E. genus.