The NPK percentages on a package of fertilizer refer to the _____
A) percentages of manure collected from different types of animals
B) relative percentages of organic and inorganic nutrients in the fertilizer
C) percentages of three important mineral nutrients
D) proportions of three different nitrogen sources
C
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Lateral inhibition via amacrine cells in the mammalian retina _____
A) underlies habituation of vision B) enhances visual contrast C) prevents bleaching in bright light D) is required for color vision to occur E) recycles neurotransmitter molecules
Effector B cells secrete antibodies that are ____ those produced by the original B cell from which they arose, which
then ____.
a. identical to; flag antigens for phagocytosis and prevent them from attaching to body cells b. different than; help antigens attach to body cells c. identical; prevent antigens from clumping together to d. different than; present them on the surface of dendritic cells e. in addition to; flag antigens for elimination by urination
Which of these often serve as cell recognition molecules on cell surfaces?
A. peripheral proteins B. transmembrane proteins C. glycoproteins D. integral proteins
A (colony/habitat/biofilm) is a mixed population of microbes growing together on surfaces.
Fill in the blank(s) with the appropriate word(s).