The mass is increased as two things are added together so the two masses of the two substances are added together.
If you're talking about eukaryotic cells then it's the cell wall. If it's a prokaryotic cell sometimes the slime layer secreted by some bacteria may harden and form a capsule around the bacterial cell.
Hope i helped!
Tropical rainforest, savannah, and dessert biomes are all classified as climax community should be some form of seasonal forest or woodland
It’s the doctor of all systems
