Two structures that allow bacteria to adhere to surfaces are ________ and ________.
A. endospores; metachromatic granules
B. fimbriae; capsules
C. pili; ribosomes
D. lipopolysaccharide; techoic acid
E. actin filaments; phospholipid membranes
Answer: B
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Eyes with single lenses that respond to light and darkness are found in many arthropods; these are the
A. compound eyes. B. ocelli. C. apposition eyes. D. ommatidia. E. superposition segments.
Is the rate of mutation in mitochondrial DNA of mammals greater or less than that of the species' nuclear DNA?
What will be an ideal response?
Which of the following statements regarding the cell-mediated immune response is TRUE?
A) Cytotoxic T lymphocytes do not require antigen presentation to become activated. B) Cytotoxic T lymphocytes interact with antibodies that have bound antigen to identify their target. C) Helper T lymphocytes have no role in the activation of cytotoxic T lymphocytes. D) Cytotoxic T lymphocytes kill by producing hydrogen peroxide. E) A single cytotoxic T lymphocyte can kill many target cells.
A particular quality of an organism is referred to as a ________, each variation of which is a particular ________
Fill in the blank(s) with correct word