Agar is a useful compound in the microbiology lab because it is an excellent nutrient for bacteria
Indicate whether the statement is true or false
FALSE
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Which of the following is not associated with salutatory propagation?
A. myelation B. nodes of Ranvier C. variable concentration of voltage-gated Na+ and K+ channels along the axon D. faster signal transmission E. extremely low threshold potential
When the longitudinal muscles within an earthworm segment contract, what effect does this have on the shape of the segment?
A. The segment will shorten and widen. B. The segment will elongate and widen. C. The segment will shorten and become narrower in diameter. D. The segment will elongate and become narrower in diameter. E. The segment will change length, but not diameter.
Base pairing
a. occurs between identical bases. b. requires hydrogen bonds. c. takes place between sugars and phosphates on the two strands in a helix. d. explains the X-ray results from Rosalind Franklin. e. occurs between A and C.
The term that refers to the presence of flagella all over the cell surface is
A. monotrichous. B. lophotrichous. C. peritrichous. D. atrichous. E. amphitrichous.