Which of the following substances is NOT secreted
by secretory neurons?
a. oxytocin
b. antidiuretic hormones
c. epinephrine
d. histamine
e. norepinephrine
Answer: d
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If the actual results most closely resembled those in part (A) in the figure above, then a further question arising from these data is:
"Do the Dawsonia rhizoids have to be alive to reduce soil nitrogen loss, or do dead rhizoids have the same effect?" Arrange the following steps in the correct sequence to test this hypothesis. 1. Add metabolic poison to the soil of the experimental plot of mosses. 2. Apply water equally to the experimental and control plots. 3. Measure initial soil nitrogen contents of control and experimental plots. 4. Determine nitrogen loss from soil of control and experimental plots. 5. Establish two identical plots of Dawsonia mosses; one as a control, the other as the experimental treatment. A) 5 ? 1 ? 3 ? 2 ? 4 B) 5 ? 2 ? 3 ?? 1 ? 4 C) 5 ? 3 ? 1 ?? 2 ? 4 D) 4 ? 5 ? 1 ? 3 ?? 2 E) 5 ? 3 ? 2 ?? 1 ? 4
The first law of thermodynamics states which of the following?
a. Energy can neither be created or destroyed. b. Entropy increases as time goes by. c. Energy can be created from matter. d. Entropy decreases as time goes by.
The opening in the eye through which light passes is known as the ____
a. sclera b. pupil c. iris d. lens e. cornea
Which of the following statements regarding fungi is FALSE?
A) Most fungi are pathogenic for humans. B) Fungi are eukaryotic heterotrophs. C) Fungi reproduce by forming asexual or sexual spores. D) Most fungi grow well in acidic culture condition. E) Fungi tolerate low moisture conditions.