Which of the following bacteria is both photosynthetic and Gram-positive?
A. Cyanobacteria
B. Heliobacteria
C. Green bacteria
D. Purple bacteria
E. None of the choices are correct.
Answer: B
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Why does active transport require ATP energy?
A. to speed up the rate of facilitated diffusion B. to allow the movement of molecules from low to high concentration C. to maintain homeostasis by consuming ATP D. to both speed up the rate of facilitated diffusion and maintain homeostasis by consuming ATP
The hydrogen-bond lattice causes water to have an unusually ____ specific heat, an unusually ____ heat of
vaporization and an unusually ____ density in solid form.
a. high; high; high b. low; low; low c. high; low; high d. high; high; low e. low; low; high
The brain can infer the pitch of a sound from the:a
number of hair cells that are stimulated. b. particular hair cells that are stimulated. c. intensity with which the hair cells are stimulated. d. intensity of the action potential produced by the stimulated hair cells. e. fluid movements of the semicircular canals.
Ferns and mosses mainly live in ________ environments
A) arid B) desert C) sterile D) moist