Moist heat kills microorganisms by
A.
irreversible denaturation of proteins.
B. destruction of carbohydrates in the cell wall.
C. denaturation of nucleic acids.
D. dissolving the capsule.
A
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Mating an individual expressing a dominant phenotype, but whose genotype is unknown, with an individual
expressing the corresponding recessive phenotype is an example of a(n): a. heterozygous cross. b. F1 cross. c. F2 cross. d. parental cross. e. test cross.
Which of the following is NOT an important feature in distinguishing animals from each other?
a. presence and cellular arrangement of tissues b. growth of skeletal elements c. body symmetry d. development of the gut e. method of locomotion (movement)
Transport epithelia are responsible for __________.
a. pumping water across a membrane b. forming an impermeable boundary at an interface with the environment c. the movement of solutes in osmoregulation or excretion d. transporting urine in the ureter and urethra e. the passive transport of H+ and HCO3- for the regulation of pH
Radish flowers may be red, purple, or white. A cross between a red-flowered plant and a white-flowered plant yields all-purple offspring. The flower color trait in radishes is an example of which of the following?
A) a multiple allelic system B) sex linkage C) codominance D) incomplete dominance