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Hibernation and Aestivation
Poikilotherms pass the winter in a resting state, known as hibernation. When they enter a resting state in response to heat or drought, the condition is called aestivation. In general Poikilotherms derive two types of benefit from the resting states that may enter during times of environmental stress.
First, by virtue of their special physiological state, the animals may enjoy an enhanced physiological ability to cope with the extreme conditions. (Example increased freezing resistance etc.) Second, they are often permitted to remain continuously in favourable microhabitats. Their metabolism is depressed to such an extent that the store of nutrients (example, body fat) can augment. The variety of mechanisms exploited by Poikilotherms in escaping some of the rigors of extreme temperatures may be divided into behavioural and physiological adaptations.
Natural selection is a process which directs all biological evolution. It is a process that directs genetic changes which when proved to be adapted to the environment are retaine
Animal Fats This group consists of depot fats from domestic land animals (e.g., lard and tallow), all containing large amounts of C16 and C18 fatty acids, medium amounts of uns
Antioxidants Antioxidants are the substances that can delay onset, or slow the rate of oxidation of autoxidizable materials. By virtue of this property, they provide protect
Oxides of sulphur: It includes SO 2 , SO 3 . It is a colorless gas having sharp, pungent and suffocating odour. It is soluble in water and forms H 2 SO 4 . Sourc
Oxidation-reduction Potential (ORP) ORP is related to the concentration of oxidizers or reducers in a solution, and their activity or strength. It provides an indication of th
according to the graph,which age is the amount og growth hormone produced at its highest?
Anther is the top of a stamen's filament; divided into pollen sacs in which the pollen grains are form.
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Q. What is Exudative diarrhoea? Exudative diarrhoea: It is associated with the mucosal damage leading to out pouring of mucus, blood and plasma proteins with a net accumulation
What are the disadvantages of protozoa
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