STATED CLEARLY: EVOLUTION AND NATURAL SELECTION (TRANSCRIPT) What exactly is evolution? In biology‚ the theory of evolution doesn’t exactly tell us how life began on Earth‚ but tells us how life‚ once it came into existence‚ diversified into the many incredible forms we see now and in the fossil record. It also helps us make sense of the way in which modern creatures continue to adapt and change today. In biology‚ evolution can be defined as: ‘Any change in the heritable traits (those are physical
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sludge is further treated in ’sludge digesters’: large heated tanks in which its chemical decomposition is catalysed by microorganisms. The sludge is largely converted to ’biogas’‚ a mixture of CH4 and CO2‚ which is used to generate electricity for the plant. The liquid is treated by bacteria which break down the organic matter remaining in solution. It is then sent to oxidation ponds where heterotrophic bacteria continue the breakdown of the organics and solar UV light destroys the harmful bacteria. The
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reason why no emf is induced in a rotating coil as it passes through a neutral plane. 5. State what component causes a generator to produce direct current rather than alternating current. 6. Identify the point at which the brush contact should change from one commutator segment to the next. 7. State how field strength can be varied in a dc generator. 8. Describe the cause of sparking between brushes and commutator. 9. State what is meant by "armature reaction." 10. State the purpose of interpoles. 11
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Medicinal plants constitute an important natural wealth of a country. They play a important role in providing primary health care services to rural people. They serve as therapeutic mediators as well as important raw materials for the manufacture of traditional and modern medicine. Substantial amount of foreign exchange can be earned by exporting medicinal plants to other countries. In this way indigenous medicinal plants play significant role of an economy of a country. Past century there has been
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The C4 & CAM Pathway Many plant species that evolved in hot‚ dry climates fix carbon through alternative pathways. Under hot and dry conditions‚ plants can rapidly lose water to the air through small pores called stomata. Stomata (singular‚ stoma)‚ are usually located on the undersurface of the leaves. Plants can reduce water loss by partially closing their stomata when the air is hot and dry. Stomata are the major passageways through which CO2 enters and O2 leaves a plant. When a plant’s stomata are
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Natural dog food and natural food produced for consumption by humans‚ uses the word natural to imply that the food produced does not contain preservatives or anything else that can be considered unnatural. Since it is not regulated‚ many are wary of the label ‘natural’. The organic labels come directly from the USDA and those labels are only used by farmer’s who are certified and inspected on a regular basis. Several years ago an inspection and study was performed by the government and the results
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Diesel Power Plant Figure shows the arrangements of the engine and its auxiliaries in a diesel power plant. The major components of the plant are: a) Engine Engine is the heart of a diesel power plant. Engine is directly connected through a gear box to the generator. Generally two-stroke engines are used for power generation. Now a days‚ advanced super & turbo charged high speed engines are available for power production. b) Air supply system Air inlet is arranged outside
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How to Plant & Grow Moringa The Moringa is a fast growing tree that can reach up to 3 meters in its first year. Moringa is an ideal plant to grow in your own backyard. Get a little Moringa in your diet‚ you can grow your own multivitamin! The Moringa tree grows to about 10 tall‚ with drooping branches. It thrives in subtropical and tropical climates‚ giving fruit and flowers continually. However Moringa grows best in dry‚ sandy soil. This makes it an ideal tree to grow in semi-desert conditions
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International Dimensions of Ethics Education in Science and Engineering Case Study Series Bhopal Plant Disaster Appendix A: Chronology by MJ Peterson Revised February 26‚ 2009 Appendix Contents: 1.) Bhopal Chronology 2.) Ensuing Litigation Chronology References used in this section: Paul Srivastava‚ Bhopal: Anatomy of a Crisis (Cambridge‚ MA: Ballinger‚ 1987). Sanjoy Hazarika‚ Bhopal: The Lessons of a Tragedy (New Delhi: Penguin Books India Pvt Ltd‚ 1987) This case was created by the International
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a wide variety of plants and their uses‚ among them the Agave plant. The agave plant was as important to barbacoa as was the fungus Ustilago maydis to the dish Huitlacoche‚ only this plant had several uses beyond the kitchen. Using my own experiences‚ the vast resources online‚ and a quick call to my parents‚ I set out to learn more about the other aspects of this plant‚ such as it’s role in the everyday life of Indigenous people. Like many other desert plants‚ the agave plant is built to survive
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