Schleiden and Schwann stated the "cell theory," which in its modern form says
A. all cells will arise spontaneously, all cells require oxygen, and all cells are composed of one or more cells.
B. all organisms are composed of one or more cells, all cells arise spontaneously, and all cells vary in size and shape.
C. all organisms are composed of one or more cells, all cells are the smallest living things, and all cells arise by division of other cells.
D. all organisms are composed of one or more cells, all cells require oxygen, and all cells arise by division of other cells.
Answer: C
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Thyroid hormone is to amphibian metamorphosis as this compound is to insect molting.
A. estogen B. aldosterone C. ecdysone D. cortisol E. butterfly peptide
Contraction of the diaphragm allows for expiration
a. true b. false
The root hairs develop in the zone of elongation.
Answer the following statement true (T) or false (F)
Streptococcal pharyngitis involves all the following, except:
A. a purulent exudate over the tonsils. B. can lead to scarlet fever if it is an erythrogenic toxin-producing strain. C. can lead to serious sequelae. D. is usually caused by the viridans streptococci. E. causes redness, difficulty in swallowing, and fever.