Expanding air masses ____
a. sink
b. rise
c. are cool and dry
d. can hold less water
e. experience no change
ANSWER: b
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Which is the CORRECT order of increasing size in soil particles?
A) clay > sand > silt B) clay > silt > sand C) sand > clay > silt D) silt > clay > sand
The Gram staining procedure is best described as a ________ staining technique.
A. simple B. negative C. selective D. differential
What part of the appendicular skeleton is specialized for strength over flexibility?
A. Pelvic girdle and lower limbs B. Pectoral girdle and upper limbs
Kelp is a type of algae in a complex ecosystem off the Pacific coast of North America. If kelp forests shrunk in size or vanished, many other species would be affected. Kelp are ____ species in this ecosystem.
a) excluded b) keystone c) competitive d) predator