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Microbes:
You should know that invisible microbes are present everywhere, because they can surviveeven under very inhospitable conditions. They are all around us, in the air we breathe, in thsoil, in food, ih water used for drinking or bathing and on all the objects we come in contacwith. You will be surprised to know that billions of them live on the skin of our body and inour mouths and intestinal tracts. One third of the dry human faeces is bacteria. However, only some of these micro-organisms cause infectious diseases. There are many others whicare beneficial and their activities are of central importance to the biosphere. Without them life on earth would perish! Long before we even knew of their-existence, we have been taking advantage of their activities, as in the case of making curds, and alcohol or baking cakes and bread. They decompose dead plants and animals, as well as sewage into harmlesbut indispensable chemicals like nitrogen, oxygen and carbon dioxide etc. They can also bused as biological factories to produce antibiotics.
In fact, the famous antibiotic, penicillinwas discovered from a culture of fungus. Certain kinds of bacteria live in human intestinesand provide vitamin B,, and vitamin K. Thus, though some microbes are harmful, athers aof great service to humanity. While the knowledge of gems has grown and some of it is used to save people from disease and death, several countries have used this knowledge fodestruction and warfare. You may have heard the word "geim warfare". These countries have collected deadly gems which can be spread in enemy countries to pollute air or wateor even to destroy crops and forests. Such warfare, obviously, kills people, not just soldierand as such it is internationally prohibited.
Properties of a Beating Heart Heart Let us study a few interesting properties of a beating heart which make it such a unique organ. 1. Automaticity 2. Rhythmicity 3. L
Venus-the Clouded Planet Venus, our nearest planetary neighbour, only 40 million km away, has its surface hidden from view by a dense yellowish-white cloud, which extends to 80
I need to write a research paper on AI
Another way to observe the buoyancy of water Push a large cork to the bottom of a pail of water. Notice the quantity of force you have to apply to hold the cork at the bottom.
For this Assignment, you will identify a social issue or problem that is important to you and reflect on how it might be remediated through the application of learning principles t
discuss fundamental principles of food processing
What are all the planets in our solar system?
What is happening to the length of a day on the Earth, as a result of the gravitational pull of the Moon?
What minerals attract lightning? Ans) Big structures and things that are metal attract lightning, also trees do. In fact, anything that is metallic having mineral may seem
Q. List any three human activities which would lead to an increase in the carbon dioxide content of air (i) Burning of fuels in various processes like heating, cooking, transpor
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