The antigen-binding site of an antibody accommodates a small portion of the antigen called a(n)
A) lipopolysaccharide.
B) epitope.
C) peptide motif.
D) pathogen associated molecular pattern (PAMP).
Answer: B
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Which term did Mendel use when referring to traits that disappeared in the F 1 generation?
a. recessive b. discontinuous c. reciprocal d. continuous
The theory of catastrophism
a. was proposed by Lyell. b. indicates that a series of disasters necessitated separate acts of creation to replace species that became extinct. c. states that one worldwide disaster led to massive extinction and subsequent replacement by a new creation. d. held that after geologic events caused extinctions, the world was repopulated by the surviving species. e. has absolutely no basis in fact because extinctions just happen with no apparent patterns.
What building blocks form a DNA molecule?
A) amino acids B) nucleotides C) fatty acid chains D) polysaccharides
Which term refers to a mutualistic symbiosis where fungal hyphae grow between and around plant roots but do NOT penetrate plant root cells?
a. an arbuscule b. an endomycorrhiza c. a lichen d. an ectomycorrhiza