Why do astronauts experience bone loss in space?
What will be an ideal response?
Bone deposition is regulated by a homeostatic response to weight stress. Without gravity there is no stress and the "unnecessary" bone is removed.
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To industrial microbiologists, fermentation means the mass culture of microorganisms.
Answer the following statement true (T) or false (F)
During the passage of a nerve impulse all of the following occur EXCEPT
a. sodium ions pass through gated channels. b. positive feedback causes more sodium ions to enter the cell. c. the interior of the cell becomes positive. d. changing voltage increases the number of open gates. e. changing voltage decreases the number of open gates.
Chromatids that are attached at the centromere are called what kind of chromatids?
a. mother b. daughter c. sister d. programmed e. either mother or daughter
The domain Archaea includes prokaryotes that are
A. endospore formers. B. intracellular parasites. C. members of the deeply branching bacteria. D. human pathogens. E. hyperthermophiles.