Which of the following is TRUE about DNA?
a) all living organisms carry DNA in practically every cell in their bodies
b) DNA can serve as an "individual identifier"
c) DNA carries instructions for the functions of every cell and enzyme in living organisms
d) DNA carries a record of evolutionary history
e) all of the above answer choices are correct
Answer: e) all of the above answer choices are correct
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The process by which bacteria and fungi break down
nitrogenous materials forming NH4+ is a. nitrification. b. ammonification. c. denitrification. d. nitrogen fixation. e. respiration.
In osmosis:
A. solutes move from a region of low water concentration to a region of high water concentration. B. solutes move from a region of high solute concentration to a region of low solute concentration. C. plasma membranes must be impermeable to water. D. water moves from extracellular to intracellular compartments. E. water moves from a region of high water concentration to a region of low water concentration.
Two populations that have adapted to similar environmental conditions sometimes have a similar appearance
Indicate whether the statement is true or false
A maintenance methyltransferase
a. acts on unmethylated DNA. b. acts on DNA strands in which only some CpG islands are methylated. c. acts on fully methylated DNA. d. acts on hemimethylated DNA. e. removes methyl groups.