Which of the following is TRUE about the
spores of seed plants?
a. megaspores develop into female
gametophytes
b. meiosis produces four megaspores
c. microspores enlarge to become megaspores
d. megaspores are diploid cells
e. microspores undergo meiosis to form four
pollen grains
A
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A) cell concentrations at varied time points. B) total number of cells in the population at varied time points. C) cell concentrations at varied time points or the generation time. D) turbidity measurements and the total number of cells in the population at varied time points.
________ primarily targets T helper cells of the immune system
Fill in the blank(s) with correct word
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a) aerobes and anaerobes. b) anaerobes and facultative anaerobes. c) aerobes and facultative anaerobes. d) aerotolerant anaerobes.
Which cell structure is an important agent in modern genetic engineering techniques?
A. ribosomes B. capsules C. plasmids D. inclusions E. mesosomes