What caterpillar saliva-based chemical stimulates a corn plant to release an alarm signal?
A) Methyl salicylate
B) Salicylic acid
C) Florigen
D) Volicitin
E) Salicin
D
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When a repressor binds to the operator site on the DNA it normally
A. inhibits the initiation of transcription. B. has no effect on transcription. C. terminates transcription that has already been initiated. D. reduces the rate of transcription.
When retinal in bacteriorhodopsin becomes excited, it directly catalyzes the formation of ATP
Indicate whether the statement is true or false.
In annelids, ____ regulate the composition of body fluid. Fill in the blank(s) with the appropriate word(s)
All of the following are major functions of roots EXCEPT
A) carrying out photosynthesis. B) interacting with soil fungi. C) transporting water and minerals. D) storing excess sugars. E) producing hormones.