The process of transpiration is driven by
a. passive transport.
b. sunlight.
c. root pressure.
d. upward pressure as sugar is forced into the roots.
e. pumping by the xylem cells.
B
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A) spongin concentration (gm/unit volume) B) rate of cribrostatin synthesis (molecules/unit time) C) number of pores per sponge D) number of spicules per sponge E) number of choanocytes per sponge
What do mitochondria and chloroplasts have in common?
a. both are found in plants cells b. both contain chlorophyll c. DNA is present in both d. ribosomes are present in both e. both are found in plants cells, and DNA and ribosomes are present in both
Why did scientists turn to genetic engineering for rice to create resistance to blight?
a. The bacteria causing blight cannot be identified. b. Efforts to cross-breed crop rice with blight-resistant rice produced rice unsuitable as a food source. c. It is the cheapest and easiest way to produce blight-resistant rice. d. Almost of the crop rice planted is lost each year to blight. e. It provided the funding necessary to sequence the rice genome.
Nature is __________ in the universe except what
humans have__________. a. living; destroyed b. everything; manufactured c. macromolecular; genetically engineered d. verifiable life-forms; selectively bred e. matter; artificially created