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Latitudinal Variations
The latitudinal variation of temperature over the earth is the result of two main variables
What do you think could be the other factors influencing temperature?The movement of wind and water, and the direction of slopes of hills and mountains also modify the temperature.We know that the length of the day varies at higher latitudes. That means the incoming solar radiation varies. However, if we compute the average, every point on the earth gets the same total hours of daylight each year, an average of 12 hours per day, but not the same amount of heat. The latter depends upbn the amount of radiant energy delivered/unit area/hr and this depends upon the angle of landing sunlight. You have learnt in the previous section that vertical beams afe more intense than the oblique beams that land on the higher latitudes. Hence we find a gradual decrease in the amount of incident radiant energytunit area along the increasing latitudes, horizontally. On the basis of temperature variation three distinct heat zones can be distinguished in each hemisphere (Figure shown below). The hot torrid zones are near the equator. moderate or temperate zones are in the middle, the cold zones are at the poles. Each zone is characterised by typical plants and animal populations found in the area.
Gill slits are the opening or the clefts between the gill arches in the fish. Water taken in by the mouth passes through the gill slits and bathes the gills. It also has rudimenta
details and terms used in growth and development?
Possible mechanisms of increased risk are that hyperhomocystinemia may impair release of nitric oxide form endothelial cells, stimulate proferation of atherogenic smooth muscle cel
List the five major phases of the cell cycle, and briefly explain what happens during each phase. G1 phase: the cell grows. S phase: DNA is copied. G2 phase: the cell prepares
Mechanical requirements of implant materials Dental implant s must be able to sustain and transfer loads -It should have adequate mechanical strength in order to distribute th
The several types of steam sterilizers that are in use. 1. Lab Autoclave 2. Hospital dressing sterilizer 3. Bowl & instrument sterilizer 4. Rapid cooling sterilizer
Q. How does self infection by tapeworms occur? The Taeniasis patients may develop the most severe form of the worm infection, cysticercosis, because their feces contain eggs
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What is the mode of nutrition in fish,human,amoeba,scorpian & toad ?
Radioactive pollution is a very special form of pollution of air, water and soil with radioactive material. Its nature of contamination and effects are different from those of othe
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