In fungi and protists, gametes produced by ____ of haploid cells fuse to form a ____ zygote, which then undergoes
____ to restore the haploid chromosome number.
a. mitosis, diploid, meiosis
b. meiosis, diploid, mitosis
c. mitosis, haploid, meiosis
d. meiosis, haploid, mitosis
e. mitosis, diploid, mitosis
a
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During metaphase,
A. heterochromatin is converted to euchromatin. B. chromosomes are about 30 nm wide. C. chromosomes are much shorter than they were in interphase. D. chromosomes undergo gene transcription. E. the "beads on a string" structure is visible.
Many proto-oncogenes encode
a. extracellular receptors. b. intracellular receptors. c. tumor suppressor proteins. d. protein kinases. e. extracellular receptors and protein kinases.
When a population goes through a bottleneck,
a. genetic drift is likely to occur. b. mutation rates increase. c. extinction rates decrease. d. natural selection decreases in intensity. e. inbreeding decreases.
Freshwater aquatic organisms are faced with the problem of preventing excessive uptake or retention of water
Indicate whether the statement is true or false