A membrane that lets only some things pass through it.
"Pheromones" is the one among the following choices given in the question that these messengers are called. The correct option among all the options that are given in the question is the second option or option "B". I hope the answer has actually come to your expected help.
Answer:
try a human shivers on a cold day that should be correct.
Explanation:
Lily pad is a water plant. It is on top of the water floating in a boat like pad. It gets water and all the energy it needs but it also uses the sun. Lily pads use more of water than sunlight.
Hope this helped!!! >.<
Normally they have equal protons and neutrons
