Do mycorrhizal symbioses occur between fungus and nonphotosynthetic plants?
A. No; nonphotosynthetic plants do not need phosphate.
B. Yes; nonphotosynthetic plants also need minerals.
C. Yes; nonphotosynthetic plants can generate organic compounds without photosynthesis.
D. No; nonphotosynthetic plants cannot provide organic compounds to fungi.
Answer: D
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Purines and pyrimidines are precursors for synthesis of ________.
A. fatty acids B. peptidoglycan C. nucleic acids D. proteins
Pheromones
a. are social signals. b. are detected by the vomeronasal organ in reptiles and most mammals. c. may serve as sex attractants. d. are not detected or responded to by humans. e. include all EXCEPT “are not detected or responded to by humans.”
What Gram reaction do you expect from acid-fast bacteria?
a. Gram-positive b. Gram-negative c. Both gram-positive and gram-negative d. Can't tell
Permease proteins that aid in the transport of nutrients resemble enzymes in their specificity for the substance to be transported. Each carrier is selective and will transport only a closely related set of substances.
Answer the following statement true (T) or false (F)