Cell - A Unit of Life
Cells of onion peelMulticellular lifeform All living organisms, whether plants or animals, are made up of microscopic units called cells. The cell occupies the same central position in biology as the atom in the physical sciences. All living beings, plants and animals, start their life wi..
Cell - A Unit of Life
All living organisms, whether plants or animals, are made up of microscopic units called cells. The cell occupies the same central position in biology as the atom in the physical sciences. All living beings, plants and animals, start their life with a single cell. Some organisms..
Cell Reproduction
One of the main ideas in the modified cell principle is that new cells arise from pre-existing cells (Omnis cellula e cellula). Every new cell formed must inherit not only the nucleus which contains the genetic information, but also should inherit the cell organelles that are required to expr..
Physical Properties
Hydrogen is a colourless, odourless and tasteless gas. Impure hydrogen has a fishy smell due to its impurities ,arsine and phosphine. Hydrogen is the lightest element. It is by far the most abundant element in the universe and makes up about 90% of the universe by weight. Hydrogen as water (H ..
Uses
As table salt, an essential constituent of our food In the manufacture of Na 2 CO 3 , NaOH, Cl 2 , etc For salting out soap, and organic dyes In freezing mixtures In tanning and textile industries As a preservative for fish, meat, butter et..
Properties of Hydrogen
Physical Properties - Hydrogen is a colourless, odourless and tasteless gas. Impure hydrogen has a fishy smell due to its impurities ,arsine and phosphine. Hydrogen is the lightest element. It is by far the most abundant element in the universe and makes up about 90% of the universe by weight. Hydr..
Some important sources of water pollution
Domestic sewage Mining and industrial wastes Herbicides and pesticides Detergent and fertilisers Mineral oils and heavy metals Organic wastes Radioactive waste..
Some Important Sources of Water Pollution
Domestic sewage Mining and industrial wastes Herbicides and pesticides Detergent and fertilisers Mineral oils and heavy metals Organic wastes Radioactive waste..
Question 7
Question: What direct value does a forest have for man? Answer: Forests contribute to the economic development of our country by providing goods and services to the people and industry. They are intimately linked with our culture and civilization. Forests are useful to us for the follow..
Symbiotic Bacteria
These are bacteria which live in a mutually beneficial association with other organisms. Such bacteria derive the essential nutrients from their host organisms and in that process help the host through some of their biological activities. 1. The most familiar example o..
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