Which statement accurately describes the properties of sound?
a. The frequency of a sound determines the loudness.
b. The amplitude of a sound determines its pitch.
c. The amplitude of a sound is the number of waves per second.
d. A soft sound has a greater amplitude than a loud sound.
e. A high note and a low note with the same amplitude are equally loud.
ANSWER: e
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Conservationists will take snow geese off the endangered species list when the population hits 10,000
If populations are sustaining growth at r = 0.088 and the population in 2001 is 3000 individuals, in what year will snow geese be taken off the endangered species list?A) between 2106 and 2109 B) between 2009 and 2012 C) between 2012 and 2015 D) between 2015 and 2018
Unlike plants, fungi, and bacteria, animal cells cannot resist volume increases in hypotonic environments. This is
because unlike those other organisms, animal cells ____.
a. do not have central vacuoles b. do not have cell walls c. do not have pumps that can actively pump out excess fluid d. are smaller than those other cells and thus cannot handle large increases in volume e. have relatively more solutes
__________ are heterotrophs that grow as a mesh of
absorptive filaments. Some are plant pathogens. Fill in the blank(s) with the appropriate word(s).
For the citrate utilization test, the bromthymol blue indicator change from blue to green when the microorganism metabolizes citrate.
a. true b. false