The specificity of certain rhizobia to infect only particular plants is in part due to the
A) abundance of nutrients present in the soil.
B) nifH genes they possess.
C) rhizobial lipids that act as signaling molecules.
D) season (time of year).
Answer: C
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a. kingdom. b. phylum. c. genus. d. species. e. class.
Enzymes classified as ________ convert chemical
bond energy to light energy. a. catalases b. lipases c. proteases d. amylases e. luciferases
Which of the following fungi usually form arbuscular mycorrhizal associations in which the outer cells of the plant roots are penetrated by the fungal hyphae?
A. Chytridiomycetes B. Ascomycetes C. Basidiomycetes D. Deuteromycetes E. Glomeromycetes
What type of cells respond to a particular hormone?
A) glandular B) target C) receptive D) endocrine