Assuming there is sufficient light to drive photosynthesis, the rate of transpiration should ___________ on a rainy day compared to a sunny day because _____________
A. decline; the H2O concentration gradient
from the inside to the outside of the leaf
would decrease
B. decline; the H2O concentration gradient
from the inside to the outside of the leaf
would increase
C. remain the same; the H2O concentration
gradient from the inside to the outside of the
leaf would not change
D. increase; the H2O concentration gradient
from the inside to the outside of the leaf
would decrease
E. increase; the H2O concentration gradient
from the inside to the outside of the leaf
would increase
A
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Which of the following statements regarding water flow in vascular plants is false?
A. Water flow through xylem conduits is directly proportional to diameter. B. Flow rate is proportional to the radius of the conduit raised to the fourth power. C. Vessels are much longer and wider than tracheids, thus their rate of water transport is much lower than that of tracheids due to increased resistance. D. The rate at which water moves in plants is a function of the number of conduits and their size. E. Water must cross pits to cross from one cell to another, adding resistance to flow.
Which process is responsible for the evolution of mitochondria and chloroplasts in eukaryotes?
a. endosymbiosis b. conjugation c. transformation d. transduction
Taking into account the enzymes produced by the koala's digestive tract and the enzymes produced by the symbiotic microbes present in the caecum, koalas are least able to digest
a. lignin. b. starch. c. cellulose. d. protein. e. fats and oils.
The application of scientific knowledge to improve the condition of humans is known as ________
Fill in the blank(s) with correct word