For most metazoans, what is the name of the innermost tissue layer during development?
a. mesoderm
b. epiderm
c. endoderm
d. ectoderm
Ans: c. endoderm
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What would you expect the optimum pH to be for the salivary enzyme amylase, which digests starches into sugars?
What will be an ideal response?
The gametophyte is the dominant stage in the life cycle for which of the following plant groups?
a. club mosses b. whisk ferns c. liverworts d. horsetails e. ferns
Gibberellin stimulates ____.
A. fruit ripening B. leaf abscission C. lateral root formation D. stem lengthening between the nodes E. stem lengthening at the tip
A sample from an abscess is stained and examined under the microscope. A Gram stain appears uniformly pink, but a GMS (Gomori methenamine silver) stain reveals brownish filaments in the sample. These findings suggest
A) necrotizing fasciitis. B) sporotrichosis. C) leishmaniasis. D) phaeohyphomycosis. E) dermatophytosis.