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Once quite widespread throughout Asia and Africa, there has been a large reduction of the cheetah's habitat and numbers though it is still seen in widely separated areas of Africa. Recent surveys of cheetah populations have shown that there is almost no genetic variation among individuals, even among those taken from the furthest points of its range. This is due to an evolutionary "bottleneck" caused by the fact that at one point cheetah populations crashed to very low numbers and then expanded from the same stock. As a result cheetahs in the wild, as well as in captivity, show several problems due to inbreeding which is threatening its future survival. The problems encountered are low sperm counts leadin g to reproductive difficulties, low survival of juveniles, morphological aberrations and high susceptibility to diseases because of low genetic diversity in the immune system. Thus, even when numbers seem relatively adequate for a given species, a low genetic diversity can increase its vulnerability to extinction.
Q. Explain about Gastric ulcers? Gastric ulcers occur in the lesser curvature of the antrum of stomach. A gastric ulcer appears to be caused by reflux of bile and factors that
Improvement of Soil Aeration Soil organisms greatly improve soil structure and facilitate aeration. Root decay leaves the soil riddled with channels, and the burrowing of worm
1. Andalusian chickens may be either black, white, or gray. The gene for black is not dominant over the gene for white, nor is the gene for white dominant over the gene for black.
Explain the Properties of Gum tragacanth Gum tragacanth swells in water to give thick viscosity dispersions or pastes similar in texture to soft gels. The viscosity shows a sh
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Connect point A and D by line which is convex to the left. The left border is formed by the left ventricle except at its upper end which is formed by the left auricle where there i
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Q. Symptoms of chronic gastritis? These include anorexia, chronic fatigue, and feeling of fullness, belching, vague epigastric pain, nausea and vomiting and passage of black ta
WHAT IS THE FUNCTION OF CELL COAT
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