How receptor molecules function with stimulus molecules. Need answer fast

What type of lipids are found in all biological membranes?

This aquarium exhibits biotic and abiotic factors in an aquatic environment. one of the abiotic factors is

Multicellular organisms use cell division, mitosis, for growth and the maintenance and repair of cells and tissues. single-celled organisms may use cell division as their method of reproduction. regardless of the reason for mitosis, the process ensures genetic continuity. what is the step in the cell cycle that ensure genetic continuity?