In plants, haploid gametophytes produce gametes by
A. mitosis.
B. nondisjunction.
C. sporulation.
D. meiosis.
E. fertilization.
A. mitosis.
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Smooth muscle is found in all of the following places except ________
a. the stomach b. biceps muscles in arms c. the uterus d. the sphincter of bladder
Which of the following processes does NOT
serve to maintain low pressure at the receiving end of sieve tube pipelines? a. sucrose conversion into cell-wall polysaccharides b. sucrose conversion into starch in the receiving regions c. sucrose conversion to glucose, which is then used in cellular respiration d. activity of companion cells e. conversion of sucrose to fructose in fruits
The set of mRNAs that share a particular mRNA-binding protein is called a(n)
a. regulatory RNA unit. b. mRNA cohort. c. mRNA community. d. RNA regulon. e. mRNA family.
The individuality of an organism is determined by the the organism's
a. amino acids b. nitrogen bases c. DNA base sequence d. order of ribosomes