Which of the following molecules help maintain cell-cell adhesions in plants?
A. cadherins
B. pectins
C. integrins
D. cellulose
B
Biology & Microbiology
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Which of the following is NOT a part of the concept of organic farming?
A. use of organic fertilizers B. use of growth regulators C. nonuse of pesticides D. nonuse of inorganic fertilizers E. use of composted wastes
Biology & Microbiology
The plant cell organelle analogous to the endosome is the
A) provacuole. B) lysosome. C) peroxisome. D) glycoxysome. E) none of the above
Biology & Microbiology
The highest elevation at which trees can grow is
A. the Arctic tree line. B. usually determined by salt spray. C. determined by temperature. D. the Antarctic tree line. E. usually determined by oxygen concentration in the atmosphere.
Biology & Microbiology
Why did the length of the first leg of the voyage vary so much?
Biology & Microbiology