Thaumarchaeote archaeons gain energy by oxidizing which of the following molecules?
A. SO4
B. H2O
C. NH3
D. C6H12O6
E. H2S
C
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You observe a houseplant on your window sill bending toward the bright afternoon sunlight. Being knowledgeable, you wish to explain the molecular events of the phototropic response to your friend. What is the correct sequence that you would describe?
I. PHOT1 attains a phosphate group, and changes shape II. cell elongation occurs on the shady side of the plant III. auxin binds its receptor at target tissues IV. light strikes PHOT1 V. PHOT1 stimulates downward auxin transport on the shady side of the plant VI. light strikes stomates, which close, minimizing water loss VII.cells on the illuminated side of the plant become shorter A) VI, VII, II B) VII, II, III, I C) IV, I, V, III, II D) IV, VI, III, VII E) any of these sequences can initiate phototropism
Secondary metabolites are produced to
A. deter herbivores. B. deter competitors. C. aid in reproduction. D. aid in growth. E. deter competitors and aid in reproduction.
The bacteria that appear to maintain balance between the members of the normal microbiota and play a vital role in limiting colonization by pathogens are
A. staphylococci. B. diptheroids. C. Candida spp. D. Malassezia spp.
________ filters are widely used to provide a flow of sterile air to hospital rooms.
Fill in the blank(s) with the appropriate word(s).