I think that the answer is d
Chemical signal can signify the lymphatic, nervous and endocrine system.
Mostly endocrine, the endocrine system is the body system responsible for providing the needed hormones for the body. These hormones and body fluids contribute and catalyse the growth, disposition, sex characteristics and other potential corresponding output of these hormones.
Isn’t it 37.2 trillion cells if that is wrong sorry
Nuclear forces, according to my textbooks! Hope this helps!
Answer:
Independent is hormone and dependent is the weight
