The function of an onion cell is to organize the biological processes of an onion. The onion, like other complex organisms, has different cells. There are cells that make up its leaves and flowers, cells that make up the onion bulb and cells that make up its roots.Know More
The type of onion cell in the plant is determined by the proteins the cell produces. As in most living things, the onion's DNA creates the blueprint for all the proteins the plant produces.
As a plant cell, the onion cell is different from the cell of an animal. For one thing, it has a cell wall that surrounds the cell membrane, which an animal cell lacks. At least some kinds of onion cells have chloroplasts, which is where photosynthesis takes place. Photosynthesis creates fuel for the plant.
An onion cell also has mitochondria, which are the power plants for the cell. Onion cells also have nuclei, which contains proteins, DNA and nucleoli. There are also Golgi bodies, which are flat bodies that prepare carbohydrates and proteins to be exported out of the cell. There are large, watery spaces called vacuoles and ribosomes. Ribosomes contain RNA, which copy the blueprints of proteins made by the DNA. Everything floats in a jelly-like substance called cytoplasm.Learn more about Cells
An onion cell has a rectangular shape. An onion cell's size can range in length from 0.25 to 0.4 millimeters. An onion is a multicellular plant.Full Answer >
The primary reason that scientists and students stain onion cells is to make it easier to discern the various structures and organelles. In practice, most cells are treated with stains or dyes to give them higher contrast and improve the researcher’s ability to visualize the key features. Several different stains and dyes are in common use, including eosin, iodine and safranin.Full Answer >
Pollen grains carry the sexual cells of plants from one flower to another. According to Pacific Union College, plants produce cells that give rise to pollen in each of four pollen sacs residing on each of the flower's anthers. Each pollen-producing cell divides, producing four discrete pollen grains. The sperm cells found in the pollen fertilize the ova found in female flowers, initiating development of the new plant.Full Answer >
According to the dictionary at Biology-Online.org, cellular irritability describes the ability of any cell to recognize and react to stimuli in its immediate surroundings. In a pathological sense, this recognition ability is under-regulated, which results in excessive amounts of the body's sensitivity to certain stimuli.Full Answer >