A high level of far-red light simulates shady conditions to a plant.

a. true
b. false


Answer: a. true

Biology & Microbiology

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Although most metabolic reactions are freely reversible, a few irreversible catabolic steps are bypassed during biosynthesis with special enzymes that catalyze the reverse reaction in order to allow for independent regulation of catabolic and anabolic pathways.

Answer the following statement true (T) or false (F)

Biology & Microbiology

Vaccination takes advantage of

a. the immune system. b. the skin as a barrier. c. injecting materials from lesions. d. delivering virus via bacteria. e. all of these.

Biology & Microbiology

Entry of mineral ions into the xylem is regulated by cells of the cortex.

Answer the following statement true (T) or false (F)

Biology & Microbiology

Each HIV particle possesses a ________ on its surface, called gp120, that precisely binds to a protein, called CD4, that is found on the surfaces of the immune system cells called macrophages and T cells.

A. glycoprotein B. phospholipid C. polysaccharide D. glycolipid E. nucleic acid

Biology & Microbiology