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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.
Do all genetic diseases result from alteration in the number of chromosomes of the cells? Besides aneuploidies there are other genetic diseases, other chromosomal abnormalities
Cyanobacteria carry out photosynthesis using two photosystems as in green plants. Furthermore, other photosynthetic bacteria, like as the purple photosynthetic bacterium Rhodospiri
Which of the following serves as an actuating signal, or as part of an actuating signal, in a negative feedback system? A. Action potentials in diaphragm skeletal muscle fibers
Venting of the Heart : It is important that heart does not distend during cardio pulmonary bypass. This is prevented by venting of the left side of the heart by inserting a cannu
CONDITIONE D REFLEX - Response which is achieved by training is conditioned reflex. I. P. Pavlov in 1920 displayed it by experimenting on dog. These are voluntary in
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(i) On Figure, draw a ring around the number which indicates the energy entering the system via photosynthesis. (ii) The total energy available to the plants in the ecosystem
Q. Explain Continuous full - thickness incision? Continuous full - thickness incisions are indicated for a variety of situations outlined below. This type of incision may be us
Inferior Epigastric Artery (I.) : This is a branch of external iliac artery supplying the abdominal wall. It is raised as a free graft for CABG. The usual length availab
Q. Explain about S-Shaped incision for a mini pedicle flap? The S - shaped incision is indicated where a papilla needs to be developed and was first described by Palacci. This
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