Fungi are important in
A. food production.
B. food spoilage.
C. production of antibiotics.
D. disease of plants.
E. All of the choices are correct.
E
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Dim light causes the pigment ________ in rods to change shape, which causes sodium channels on the photoreceptor cell to close and activate ganglion cells
Fill in the blank(s) with correct word
Mechanisms of Imatinib mesylate (gleevec) action include all of the following except:
A. Inhibits BCR-ABL B. Promotes signal transduction in CML C. Inhibits PDGFR D. Inhibits c-kit
A stem that cannot increase in diameter is lacking what type of tissue?
A. Protoderm B. Vascular cambium C. Xylem D. Procambium E. Ground meristem
Which of the following would be a position held by an adherent of the punctuated equilibrium theory?
A) A new species forms most of its unique features as it comes into existence and then changes little for the duration of its existence. B) One should expect to find many transitional fossils left by organisms in the process of forming new species. C) Given enough time, most existing species will gradually evolve into new species. D) Natural selection is unimportant as a mechanism of evolution. E) Most speciation is anagenetic.