Describe the four requirements for chemical evolution and why each was essential. What will be an ideal response?
Concepts to Consider: Little or no free oxygen; a source of energy; chemical building blocks
including water, dissolved inorganic minerals, and gases; plenty of time.
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The fluorochrome stain that can be used to detect mycobacteria is:
a. calcofluor white. b. acridine orange. c. auramine. d. immunofluorescence.
Which are endocrine organs? (Check all that apply.)
_____ adenohypophysis _____ adrenal gland _____ cochlea _____ hypothalamus _____ ileum _____ lymph node _____ neurohypophysis _____ ovary _____ pancreas _____ pineal gland _____ salivary gland _____ sebaceous gland _____ spleen _____ testis _____ thyroid gland
How are amino acids different from one another?
a. The R-group, or side chain, is different in each amino acid. b. The central backbone of the amino acid molecule is different in each one. c. The amino group is different in each one. d. The carboxyl group is somewhat variable in each one.
During the day in most plants
a. carbon dioxide accumulates in leaf cells. b. turgor pressure in the guard cells decreases. c. water and potassium move into the guard cells. d. the guard cells wilt. e. water is conserved.