Abscission and dormancy are triggered by
environmental cues such as seasonal changes in
__________ or __________. Fill in the blank(s) with the appropriate word(s).
Answer: temperature; daylength
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Although lacking a TCA cycle and a respiratory chain, ________ can divide with a generation time of eight to ten minutes when growing in a human host.
A. Staphylococcus aureus B. Streptococcus pyogenes C. Clostridium perfringens D. Helicobacter pylori
Phytoplankton use body size to keep afloat because a small body size ________ surface-area to volume ratio and ________ their frictional resistance.
Fill in the blank(s) with the appropriate word(s).
If a test tube of whole blood is subjected to centrifugation, the cells will be packed in the bottom of the
tube and the fluid above it will be designated a. water. b. serum. c. lymph. d. interstitial fluid. e. plasma.
Sewage sludge, the solid that remains after aerobic decomposition, makes a useful fertilizer because
A. it contains significant energy in the form of methane. B. it has been treated to remove microbes and will not be a source of pathogens. C. it is rich in nitrogen, phosphorus, and potassium. D. it is rich in carbon and nitrogen.