Which of the following is used to characterize a material as either a neurotransmitter or a hormone?
A) its chemical composition
B) its physiological behavior
C) both a and b
D) either a or b
B
Environmental & Atmospheric Sciences
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Rocks show positive magnetic anomaly when:
a) They record the normal polarity b) They record reverse polarity c) They contain unusually high amounts of magnetic minerals d) They contain unusually low amounts of magnetic minerals e) they have a certain chemical composition
Environmental & Atmospheric Sciences
________ soils commonly consist entirely of O and A horizons
A) Forest B) Rainforest C) Grassland D) Desert E) Wetland
Environmental & Atmospheric Sciences
Which of the four numbered features on this figure is the oldest?
A. 1 B. 2 C. 3 D. 4
Environmental & Atmospheric Sciences
Oceanic ridges are geologically stable features where sediments are deposited and nothing much else takes place.
a. true b. false
Environmental & Atmospheric Sciences