In seed plants, the microspores become ___
a. ovules
b. seeds
c. pollen grains
d. cones
e. sperm cells
ANSWER: c
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A central vacuole
(a) is found only in plant cells. (b) may take up between 50% and 90% of the cell’s interior. (c) regulates water balance. (d) is all of the above.
When whole cells or large molecules in solution are engulfed by a cell, this endocytosis is specifically termed ________.
A. facilitated transport B. phagocytosis C. pinocytosis D. exocytosis E. facilitated diffusion
Pasteurization does not inactivate endospores or thermoduric microbes.
Answer the following statement true (T) or false (F)
Moist heat damages microorganisms by
A. damaging the phospholipid bilayer. B. denaturing and coagulating cellular proteins. C. oxidation of cellular components. D. damaging the cells nucleic acids.