A pairs with T (Thymine)
C Pairs with G (Guanine)
It is a study of ECOSYSTEM and known as ECOLOGY......
Answer:
c) A cell must have the appropriate receptor before it can bind to the hormone.
Explanation:
Hormones are chemical signals that are secreted into the circulatory system acting as regulators within the body, and even though they can reach any part on the body, <em>only certain types of cells are equipped to respond, these cells are known as target cells, when the hormone reaches a cell with an adequate receptors it triggers a signal transduction and then a response.</em>
Therefore the correct answer is c.
I hope you find this information useful and interesting! Good luck!
Maybe, not sure, may need to check yahoo answers for this one
