Kidney. The kidney plays the role of keeping blood pressure in check by altering the blood volume.
Receptors are loated in the sense organs.
It seems that you have missed the given options for this question, but anyway here is the correct answer. The name of the process in which genes are identified by transforming mutant cells and screening for restoration of wild-type function is called CLONING BY COMPLEMENTATION. Hope this answer helps. Thanks for posting.
B. comet
comets only have tails because the sun is shining its light on the ice and dust behind the comet
