When, if ever, do molecules stop moving?
A) At absolute zero (-273.15°C) B) At the freezing point (0°C)
C) At the boiling point (100°C) D) Never
A
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Which of the following is an example of an
event that would set up the scene for primary succession?
a. a dense landslide of mountain rocks covering an entire valley b. a fire that burns off all of the surface vegetation c. an agricultural field that is abandoned d. a lake that dries up killing all of the aquatic plants e. all of these set the scene for secondary succession NOT primary succession
Four of the following statements are true about stramenopiles. Which statement is FALSE?
a. They are filamentous heterotrophs. b. Some species are unicellular. c. They include diatoms and red algae. d. Most are photosynthetic. e. Their chloroplast structure suggests evolution by secondary endosymbiosis.
The body’s acid-base balance relies strongly on
1.reabsorption. 2.filtration. 3.secretion. 4.urination. 5.neutralization.
Nitrogen __________ by bacteria in root __________ gives a plant extra nitrogen. Fill in the blank(s) with the appropriate word(s)