Answer:
Crest
Trough
Rarefaction
Compression
Amplitude
I think this may help if this is what you were looking for as an answer...
B. Chloroplast
A chloroplast is an organelle found in the cells of green plants, it basically turns the plants green, animals do not have chloroplasts.
How about "recombinant DNA?" Which is the result of DNA cloning as ttom suggests.
The answer is c. i'm pretty sure