Crossing-over that occurs only between two specific DNA target sites that are usually less than 200 base pairs long is called
A) mitotic recombination.
B) integrative recombination.
C) site-specific recombination.
D) homologous recombination.
E) non-random recombination.
C) site-specific recombination.
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The perception of a certain pitch of sound depends partly on which of the following?
A. the amplitude of the sound waves B. which bones of the middle ear are moved C. which hair cells of the cochlea are stimulated D. where particles settle in the semicircular canals E. whether it is the round window or oval window that vibrates
Osmoregulation is the control of ____
a. the internal environment b. temperature c. metabolic wastes d. water and ion balance e. hyperthermia
Which of the following proteins are part of the first line of defense against microbial invasion?
A) dermcidins B) TLRs C) NOD proteins D) C3 and C5 E) interferons
Fixed smears of specimens are required in order to perform the Gram stain and endospore stain on the specimens.
Answer the following statement true (T) or false (F)