The taxonomic rank that includes orders but not phyla is:
a) kingdom.
b) domain.
c) genus.
d) class.
e) family.
Ans: d) class.
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Which of the following is (are) involved with an antigen binding to an antibody?
A. Noncovalent bonds B. Amino acids and the antigen's epitope determinant C. Folding of both the V(H) and V(L) regions D. All of these are correct.
In moving a molecule of oxygen from the air to a muscle cell, which organ system(s) is(are)
involved?
a. respiratory b. circulatory c. nervous d. all of these
Which of the following is a characteristic of annelids?
A. radial symmetry B. cephalization C. psuedocoelom D. closed circulatory system E. incomplete digestive tract
What is the first step in the production of a siRNA?
A. infection with a virus B. cleavage to form a short double-stranded RNA C. design of an experimental treatment D. transcription from a nuclear gene E. export of the pre-miRNA from the nucleus