The question is asking to choose among the following choices is the features that would help a plant adapt to a tropical forest biome, and in my research and further investigation, I would say that the answer is <span>b waxy leaves with drip tips. I hope you are satisfied with my answer and feel free to ask for more </span>
Neurons, act as the communicators of the nervous system. Neurons receive information, integrate it, and pass it along. They communicate with one another, with cells in the sensory organs, and with muscles and glands.
Information was taken from: http://www.sparknotes.com/psychology/psych101/thebrain/section2/
In case you would like to do further reading.
This would happen if the nervous system did not respond to unchanging stimulation through sensory adaptation.
Enzymes act as a catalyst they speed up reactions by providing a alternative pathway of lower activation energy by attaching to itself to its specific substrate and breaking down the energy required to start the process making it quicker.
And no they just speed the process up :)