A DNA molecule that enters a bacterium by one of several mechanisms is called a(n)
A. merozygote.
B. endogenote.
C. exogenote.
D. None of the choices are correct.
Answer: C
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True or false: Marine fish have impermeable renal tubules, allowing them to reabsorb scarce elecrolytes without also reabsorbing water they are trying to eliminate
A. true B. false
Rudolf Virchow is given credit for proposing which of the following theories?
A) abiogenesis B) biogenesis C) germ theory of disease D) spontaneous generation
Genes are
a. located on chromosomes. b. inherited in the same way as chromosomes. c. arranged in linear sequence on chromosomes. d. may be exchanged between homologous chromosomes. e. all of these.
Which of the following is converted inside root cells into its product, which is then rapidly used to synthesize organic molecules?
a. NH4+ is converted to NO3?. b. N2 is converted to NO3?. c. NO3? is converted toNH4+. d. NH is converted to NH4+.