I may be wrong but I think it’s the second one. They speed up reactions, and there’s a certain enzyme for a certain reaction.
The first is A second is C
The cerebrum is a large part of the brain containing the cerebral cortex it lies either in front or on top of the brainstem
How day length affects crop production most plant donot grow when day length is less than 10 hours . Even if the temperature is kept within the optimum range _ For example in a climate _ controlled greenhouse _ most plant will just sit dormat until the magic 10 hours of light perday arrives
