____ stimulates rapid elongation of a floral stalk in many plant species
a. Abscisic acid
b. Gibberellin
c. Cytokinin
d. Ethylene
e. Auxin
b
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Trypanosoma and Leshmania species are transmitted by
A) direct person-to-person contact. B) insect vectors. C) contaminated food or water. D) contaminated needles and syringes.
A cross bridge is the binding of which two proteins?
A. actin and myosin B. actin and troponin C. myosin and troponin D. collagen and troponin E. myosin and collagen
Nitrogen is used in plant cells to produce which of the following?
A. sugars B. proteins and nucleic acids C. proteins D. sugars and nucleic acids E. nucleic acids
Modern biology is guided by the cell theory, the view that _____.
A) all living things arise from other living things B) the cell is the smallest unit of organization capable of life C) living organisms are formed from one or more cells D) cell growth and division account for the continuity of life E) all of the choices