Which plants have no vascular tissue?
a. angiosperms
b. bryophytes
c. conifers
d. ferns
e. ginkgos
b
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What must happen to amino acids before they can be used in catabolic reactions?
A. They must be decarboxylated B. They must be deoxygenated C. They must be dehydrogenated D. They must be deaminated
Refer to the accompanying figure. Which statement is FALSE?
a. The of the air in the alveoli must be greater than 100 mm Hg. b. The in the tissues must be less than 100 mm Hg. c. The of the air in the alveoli must be less than 40 mm Hg. d. The in the tissues must be greater than 40 mm Hg. e. The in the tissues must be equal to the in the tissues.
Illness, stress, or anxiety override the negative feedback loop that regulates ____, thus causing its level to soar.
A. cortisol B. somatotropin C. insulin D. prolactin E. parathyroid hormone
Which of the following never have cell walls?
A) algae B) animal cells C) archaea D) bacteria E) fungi