The very function, or job of CELL MEMBRANES is to protect the cell from it's surroundings, or in other words, to keep it safe. It controls the movement of substances in and out of cells and organelles, like a guard watching for suspicious activity and protecting something.
The cell membrane itself is a thin, flexible layer around the cells of all living things. It separates the inside of the cells from the outside of the cells.
Since they have no predators the zebra mussel population will grow rapidly. Whatever the zebra mussels consume will have a major decrease in population since there are so many zebra mussels.
Cells make up the tissues which combine to form the organs and then different organ systems make up the organism
so it's cells-tissues-organs-organ system-organism
Pyroclastic flows,lava flows and lahars are hazardous. Geothermal energy is beneficial.
Volcanic ash and volcanic materials can be both hazardous and beneficial.
Hope this helps you!
