Co2+h20+ light energy ---->02+ <span>carbohydrate Photosynthesis takes place in plants cells and sometimes in bacteria</span>
The atomic number of an element is the same as the number of protons in the nucleus of an atom
Answer:
b. They express the appropriate receptor.
Explanation:
The signal transductions are extraordinarily specific and sensitive. Specificity is achieved by a <u>precise molecular complementarity between the signal molecules and the recepto</u>r. For example, the thyrotropin-releasing hormone produces a response in cells of the adenohypophysis, but not in hepatocytes, which lack the receptors to this hormone.