Answer: a) relies on the uptake of an external signal molecule from the cell
Explanation: Signal transduction is known as the transmitting of any signal of a molecule from exterior of cell to interior of cell.This technique is termed as critical is taken care of successful transmission of signal effectively and positive result and reception is done by the cell surface receptors.It is also known as cell signalling. Thus,option(a) is the correct option of all.
B is the most efficient answer
Answer:
The ability to change internal body temperatures to match changing external environmental temperatures
Explanation: this is basically the same thing as homeostasis as this is occurring in warm blooded mammals
I think the answer in this is c because it shows how the scientist worked in feilds
The two function are Protection, Contains sensory receptors, production of vitamin D, regulation of body temperature I got only that
