Plz i need question 1 compare and contrast communication by molecular signal with communication by enzyme-linked receptor. question 2 compare and contrast communication by nerve signal with communication across plasmodesmata. question 3 describe diffusion using the words concentration and concentration gradient.

1. Molecular Communication is the communication that is happens through the molecules of one cell with cell signals when it comes in contact with another cell where as enzyme-linked receptor is the communication that happens through the proteins that are on the outer surface of the plasma membrane. 2. Communication by nerve signal is done through the nerve impulse that are mostly electrical signals moving in and out of the cell whereas communication across Plasmodesmata happens through the small channels which are situated along the cell wall which enables the communication. 3. Diffusion is described as spreading of molecules from high concentration area to low concentration area and this difference in the concentration is determined by concentration gradient.

It is evolution, because we all have some of the same traits like eye color or shape or ears.