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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.
Q. International Codes used for system of binomial nomenclature? In 1753 Linnaeus suggested a system of binomial nomenclature where each individual is denoted by two epithets,
Physiological Changes - Consequences of Aging Various physiological regulatory mechanisms show decreased efficiency due to aging. For instance, normally the glucose level in t
Q. Can Diseases be etiological factor for diabetes? Diseases: In aging, a very important cause of diabetes could be an underlying disease. Diabetes occurs secondary lo some ot
The cardiovascular system controls the movement of blood through thousands of miles of capillaries so that every tissue in every part of the body is perfused. Essential nutrients
Cutaneous respiration in frogs and toads
Define Procedure for Detection of Number of Bacteria in Milk? 1. Place a clean, non-greasy slide over the graph paper. 2. Spread 0.01 ml of the milk over an area of 1 cm2 as
NEURITE S - The processes of neurons are called neurites. These are of two types: dendrites or dendrons and an axon or axis cylinder or neuraxon. (a) Dendrites (Den
Feeding management Feeding management deals about the in-house management in which the feed consumption pattern is well understood in the sheds and suitable alterations are made
Storage Excretion Many insects exhibit a phenomenon known as storage excretion. If excretory products are stored in the body instead of being eliminated, no water is expended
Acrylamide gel is a polymer gel used for electrophoresis of DNA or protein to measure their sizes (in the daltons for proteins, or in base pairs for DNA). See "Gel electrophoresis
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