AP BIOLOGY

Detailed explanation-1: -Cells communicate by sending and receiving signals. Signals may come from the environment, or they may come from other cells. In order to trigger a response, these signals must be transmitted across the cell membrane. Sometimes the signal itself can cross the membrane.

Detailed explanation-2: -Cells communicate with each other using chemicals called signaling molecules. The cell secretes these molecules out. Other cells detect the presence of the signaling molecule through receptors present on their surface. Once signaling molecule is detected, the cells will make changes.

Detailed explanation-3: -Plant cells communicate with each other via narrow channels embedded across adjacent cell walls. These channels, called plasmodesmata, allow molecules to pass between cells, thereby enabling plants to grow normally and develop tissues and organs.

Detailed explanation-4: -The three main ways for cells to connect with each other are: gap junctions, tight junctions, and desmosomes. These types of junctions have different purposes, and are found in different places.