A common GTP-binding messenger that links the receipt of an extracellular signal to the production of an intracellular one is _____.
-G protein
-actin
-ethylene
-cadherin
G protein
You might also like to view...
The scientist usually considered the first to see microorganisms, which he called "animalcules", was
A. Redi. B. van Leeuwenhoek. C. Pasteur. D. Tyndall.
Why is meiosis necessary for sexual reproduction?
What will be an ideal response?
How was E. coli was used to aid in the cloning of the bioluminescence genes from Vibrio fischeri?
A) Gene fragments from V. fischeri were transformed into E. coli and bioluminescent E. coli were identified. B) Gene fragments from V. fischeri were cloned into plasmids, transformed into E. coli, and then retransformed back into V. fischeri. C) Gene fragments from E. coli were used to disrupt the bioluminescence genes of V. fischeri by homologous recombination. D) Transposons from E. coli were used to mutagenize the bioluminescence genes of V. fischeri.
C4 plants have better water conservation abilities than do many other plants (especially C3). This is because:
a) C3 plants are able to keep their stomata closed during the day. b) C4 plants have smaller stomata that are protected by hairs and pits. c) C4 plants open their stomata at night. d) C4 plants have no leaves, they use their stems for photosynthesis. e) C4 plants have the ability to obtain CO2 without opening their stomata.