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Where can you find onion epidermal cells and what is their significance in plant biology?
Onion epidermal cells can be found in the thin, transparent layer on the surface of an onion bulb. These cells are significant in plant biology because they are commonly used in science experiments to study cell structure, division, and function. They are also used to observe processes such as osmosis and plasmolysis.
Introduction in an onion and cheek slide in a biology practical?
In an onion slide preparation, thin layers of onion cells are placed on a slide, stained, and observed under a microscope to study cell structure. On the other hand, a cheek slide involves gently scraping cells from the inside of the cheek, staining them, and examining them microscopically. Both slides are commonly used in biology practicals to observe and compare plant (onion) and animal (cheek) cell structure.
What polysaccharides is used for structure in plants?
It is simply the cell wall. It is made of cellulose, other polysaccharides, and protein.
What is inside a plant cell that is not in a animals cell?
Plant cells have chloroplast and a cell wall. Animal cells don't. The chloroplast is used for photosynthesis. The wall is just for structure and some protection.
What an onion cell look like?
1. The cells of an onion skin are generally rectangular in shape and range in size from 0.25 to 0.4 millimeters in length (250-400 micrometers). A millimeter is abbreviated by mm and a micrometer by the Greek letter mu (12th letter of Greek alphabet) followed by an m:millimeterabout 1/25th of an inchmicrometer1/25,000th of an inchLeft: Microscopic view of an onion skin showing several rectangular cells, each with a small, spherical nucleus (red arrow). The slide was stained with a drop of yellowish-brown gram's iodine. Right: Highly magnified view of a cell from the meristematic root tip of an onion showing enlarged nucleus containing 16 chromosomes. The cell is in prophase of mitosis, with distinct chromosomes (chromosome doublets) and a disintegrating nuclear membrane.Onion is a term used for many plants in the genus Allium. They are known by the common name "Onion is a term used for many plants in the genus Allium. They are known by the common name "onion" but, used without qualifiers, it usually refers to Allium cepa onion" but, used without qualifiers, it usually refers to Allium cepa.
What term is used to describe unspecialized plant and animal cell and selected microbes?
The structure of an unspecialized plant cell is more square in shape. It has a cell wall to protect it and chloroplast which gives it chlorophyll that makes it visible as green, a cell membrane, a nucleus, The structure of an unspecialized animal cell, however, has all the structure except a cell wall and chloroplast.
What is the largest clear structure in the plant cell that is used for water storage?
The largest clear structure in the plant cell that is used for water storage is the central vacuole. This organelle helps maintain turgor pressure within the cell, providing structural support and storing essential nutrients and waste products.
Why is iodine used when observing onion cells?
AnswerIodine was used to stain onion epidermal cells so you could see the cells more clearly and examine them. Naturally, the cell parts are difficult to see because they are clear.You put iodine on onion cells in order to make parts of the cell which were translucent, more visible. This is because iodine stains starch present in the onion cell.
Why do plant cells have a cell and animal cell does not?
Becuse plant cells need structure and the cell wall gives it that and it also gives it a defined shape and animals have spines instead so it is not needed/used.
What does a mircoscope does?
A microscope magnifies whatever you place under it. For example, it can be used to look at the cell structure of onion skin because it magnifies the onion so that you can see it better, to the naked eye, looking at it doesn't give many answers.
Why do plant cells have a cell wall and animal cell does not?
Becuse plant cells need structure and the cell wall gives it that and it also gives it a defined shape and animals have spines instead so it is not needed/used.
Is the vacuole a plant cell or an animal cell?
Vacuoles appear in both animal and plant cells, but they perform different functions. In animal cells, vacuoles are rather small compared to those of plant cells and are more used a receptacles for waste products of the cell. In plant cells, vacuoles serve a much larger purpose. The biggest organelle in the plant cell, the central vacuole, is used to hold water and maintain the structure of the plant cell. In addition, the central vacuole can be used to enlarge and lengthen the cell by taking in water from its surroundings.
