A growth medium or culture medium is a liquid or gel designed to support the growth of microorganisms or cells, or small plants like the moss Physcomitrella patens. There are different types of media for growing different types of cells.
Best Answer: Reading some arbitrary definition of a crystal might get confusing so I'll simplify it. What you are thinking of are the chemical compound called calcium oxalate.They form needle shaped crystals in a plant cell's vacuole that pretty much look like toothpicks. Their main function is to protect the plant from herbivores.They aren't chemically poisonous but because of their shape, they can prick soft tissue.hen an herbivore eat a part of the plant, the vacuoles are smashed up and these needle like crystals are exposed along with the sap of the plant. Perhaps you've been exposed to these crystals when you squeeze a part of a plant and touch its sap.
Its main function is storage. Vacuoles are found in the cytoplasm of most plant cells. They are membrane bound organelles, they perform functions of secretion, excretion and storage. Tonoplast: A vacuole that is surrounded by a membrane is called tonoplast.ell wall: The cell wall is a rigid layer that surrounds the plant cells. It is made up of cellulose. Cell wall is a characteristic feature to cells of plants. Plant cell walls are primarily made up of cellulose.