How does sap move from the sieve tube into a sink?
A. by a pump
B. by pressure
C. by gravity
D. by osmosis
E. by active transport
Ans: B. by pressure
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Resonance ________ describes a condition in which extra electrons are delocalized over all possible bonds.
Fill in the blank(s) with the appropriate word(s).
Water treatment processes for drinking water
A. are similar to wastewater treatment. B. are only necessary when using recycled water. C. includes disinfection but not filtration. D. has no biological treatment phase.
The activity of which organelles helps keep the
ingestion of all but excessive amounts of ethyl alcohol from being fatal? a. Golgi bodies b. vesicles c. mitochondria d. lysosomes e. peroxisomes
When the blood level of calcium falls below normal, which hormone stimulates osteoclasts to break
down bone and release calcium? a. growth hormone b. thyroid hormone c. calcitonin d. thyroid hormone e. PTH