Which is the major form of antibody in external secretions?
A. IgM
B. IgG
C. IgD
D. IgA
E. IgE
D. IgA
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In vascular plants the ________ is larger than the __________
A. diploid sprorophyte; haploid gametophyte B. diploid gametophyte; haploid sporophyte C. haploid sporophyte; diploid gametophyte D. haploid gametophyte; diploid sporophyte
Shiga toxin is dangerous to humans because it is an _____
a. endotoxin that kills cells b. endotoxin that illicit an immune response c. exotoxin that interferes with protein synthesis by intestinal cells d. exotoxin that disrupts nerve cell function e. exotoxin that can overwhelm the immune response and decrease blood pressure
Secondary growth (thickening) arises from ____________________. Fill in the blank(s) with the appropriate word(s)
When examining the genetic code, it is apparent that ________
A) there are 44 stop codons because there are only 20 amino acids B) AUG is a terminating codon C) there can be more than one codon for a particular amino acid D) the code is ambiguous in that the same codon can code for two or more amino acids E) there can be more than one amino acid for a particular codon