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Water loss during excretion
In terrestrial animals body water is also lost during excretion of nitrogenous wastes. A number of physiological adaptations have taken place to minimise the loss of water associated with this phenomena. You have learnt in the previous Unit that among terrestrial invertebrates, insects are highly effective in conserving water.
In terrestrial vertebrates, kidney is the chief organ of osmoregulation and excretion. The loop of Henle is the specialised part of the nephron which produces hyperosmotic urine. Amphibians and reptiles which are unable to produce a hyperosmotic urine, as an adaptive consequence, cease urine production entirely during the period of osmotic stress.
Why is the dietary obtainment of iodine so important for thyroid functioning? The obtainment of iodine from the diet is significant for the thyroid because this chemical elemen
Define nutrient requirements during the periods of pregnancy? In the previous unit, we learnt about the basic principles of meal planning and the various considerations and gui
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What are the three periods into which interphase is divided? Interphase is the preceding phase to the mitotic division. It is separated into three periods, G1, S and G2 (the l
The fact that some pure solutions of hydrocarbons do not readily evaporate at room temperature is a result of- Select one: a. London dispersion forces. b. The hydrophobic
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How is snow - blindness caused in humans? a) Mention the site where syngamy happens in amphibians and reptiles correspondingly.
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The common nitrogen-fixer in paddy fields is: 1. Rhizobium 2. Azospirillum 3. Oscillatoria 4. Frankia Azospirillum is the common nitrogen-fixer in paddy fields
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