What is the function of the major histocompatibility complex?
A. It promotes phagocytosis by binding to
antigens.
B. It facilitates antigen recognition by T cell
receptors.
C. It triggers endocytosis of the antigen.
D. It stimulates cell division.
B
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Over the last two decades the incidence of multiple
births has a. increased in frequency by 60%. b. decreased in frequency by10%. c. remained relatively constant. d. decreased the number of adoptions. e. done none of these.
If the heterozygous phenotype is intermediate between those of the two different homozygotes, this is called Select one:
a. epistasis. b. independent assortment. c. codominance. d. incomplete dominance. e. polygenic.
The main bulk of a multicellular fungus is called the _________.
a. fruiting body b. thallus c. hyphae d. spore e. mycelium
Reactions that require energy are called ________ reactions
a. endergonic b. endothermic c. exergonic d. exothermic