The purification and elucidation of the primary auxin's chemical structure were accomplished by:
a. Charles Darwin.
b. Francis Darwin.
c. Frits Went.
d. Kenneth Thimann.
e. F. Skoog.
d
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One surface of an epithelium faces the environment or some body fluid. The opposite surface is glued to an underlying tissue by:
a. tight junctions b. connective tissue c. the basement membrane d. adhering junctions e. stratified epithelium
Clay soils have smaller pores and hold considerably less water than sandy soils
Indicate whether the statement is true or false
Nearly every eukaryotic cell
A) has its genetic material concentrated in a membrane-enclosed nucleus. B) has a cell wall composed of cellulose that serves as the outer boundary of the cell. C) contains a hard, noncompressible fluid called the cytosol. D) possesses flagella and cilia, unlike prokaryotes. E) contains all of its genetic material in mitochondria.
Energy is commonly defined as ____.
A. a form of heat B. thermodynamics C. the capacity to change D. the capacity to do work E. the ability to do work