The Five I's of studying microorganisms include all of the following except
A. inoculation.
B. incubation.
C. infection.
D. isolation.
E. identification
C. infection.
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Wilting of a plant occurs
a. if the plant is placed in an isotonic solution. b. if there is a rise in turgor pressure. c. as a result of facilitated diffusion. d. if the plant is placed in a hypertonic solution. e. if the plant is placed in a hypotonic solution
You observe a group of fish turn almost simultaneously in the same direction. Which receptors are
they using? a. lateral line organs b. otoliths c. cristae d. stereocilia e. statocysts
The plasma membrane Na+/K+-ATPase pump
A. is a symporter. B. is used to generate sodium and potassium gradients across the membrane. C. does not require ATP. D. is a pump for facilitated diffusion of K+ into the cell and Na+ out of the cell. E. is a pump for active transport of K+ out of the cell and Na+ into the cell.
Normal diploid somatic (body) cells of the mosquito Culex pipiens contain six chromosomes. Assuming that all nuclear DNA is restricted to chromosomes and that the amount of nuclear DNA essentially doubles during the S phase of interphase, how much
nuclear DNA would be present in metaphase I of mitosis? Note: Assume that the G1 nucleus of a mosquito cell contains 3.0 × 10-12 grams of DNA. A) 3.0 × 10?12 g B) 6.0 × 10?12 g C) 12 × 10?12 g D) 0.75 × 10?12 g E) 1.5 × 10?12 g