The scientific definition of plasmolysis is stated as the contraction of the protoplasm of cells within plants due to the loss of water through osmosis. It is when the cell membrane peels off of the cell wall and the vacuole collapses when placed in a hypertonic environment.Know More
The process of plasmolysis occurs when water is drawn out of the cell into fluids outside of the cell through the process of osmosis. Osmosis occurs when a cell has a higher concentration of water than its surroundings. The phenomenon of plasmolysis is unlikely to occur naturally, and is typically induced in laboratory environments by immersing a plant cell into a strong saline or sucrose solution.
A common exhibit of plasmolysis is to place the outer tissue of an onion in a solution of calcium nitrate. When immersed, the onion cells rapidly lose water through osmosis, and the protoplasm of the cell shrinks. This occurs because the calcium nitrate solution can easily pass through the cell membrane and cause an imbalance of osmotic pressure with the solution in the large vacuole in the center of the cell. The vacuole loses water and becomes smaller causing the plasma membrane and protoplasm within it to contract. Unless the onion tissue is transferred quickly from the sugar or saline solution, the cell dies.Learn more about Botany
Plants are necessary because they are a primary food source and provide the oxygen that is vital to animals' and humans' existence. A majority of the calories that people consume comes from plants, and most meat comes from animals that eat plants. Plants are at the bottom of the food chain, and animals could not survive without them. Plants also release the oxygen that humans and animals breathe.Full Answer >
Plants are green because of a pigment called chlorophyll. Chlorophyll absorbs all colors of visible light except for green, which is reflected. Thus, the reflection of the green part of visible light is what causes plants to look green.Full Answer >
Plants provide a great deal of benefits to both humans and the environments and ecosystems in which they exist. These benefits include generating oxygen, providing energy, developing as habitats for certain types of animals, preserving the qualities of different types of soil and providing a number of useful products. In addition to the food and oxygen provided, plants are used to help manufacture many different types of products.Full Answer >
Plants require calcium for proper growth because calcium is essential for the development of strong cell walls. The element is also used in cellular signaling, a biological process critical to a plant's healthy development.Full Answer >