An antimicrobial drug that inhibits the growth of bacteria without affecting the growth or function of cells in the human host is described as being ________.
Fill in the blank(s) with the appropriate word(s).
selectively toxic
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Which of these is not part of the life cycle of brown algae?
A. meiosis B. multicellular haploid stage C. multicellular diploid stage D. gametes produced by mitosis E. spores produced by mitosis
B cells:a
are produced in the adult spleen. b. lyse bacterial cell walls by secreting digestive enzymes. c. can become plasma cells, which produce interleukins. d. undergo clonal selection once activated. e. stimulate apoptosis
Which of the following is the group of archaea that can use CO2 as their final electron acceptor during anaerobic respiration, producing CH4?
A) methylotrophs B) methanotrophs C) methanogens D) anoxygenic photosynthesizers
Sponges have which of the following?
a. symmetry b. organs c. anus d. spicules e. appendages