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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.
According to the current concept of speciation, a widely distributed species should break up into partially isolated rule species. The different subspecies become differentiated fu
Pulse wave transducer has one Doppler crystal. This crystal emits a short burst of ultrasound at a certain frequency [PULSE REPETITION FREQUENCY (PRF)]. The ultrasqund is reflec
A device called a hemocytometer is often used to estimate the number of cells in a culture. Cells are suspended in fluid. A small volume of the fluid is placed into a special chamb
a soil surface of 10cm2 may contain what type of hyphae?
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What is Iron Overload and Toxicity? We have seen that absorption of iron is very effectively regulated. This prevents overload of the tissues with iron from diet/supplements in
Define Can or receptacle and Labeling and packing? Can/receptacle - This may be performed manually or by using sophisticated filling machinery. The ratio of liquid to solid in
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Key skills for healthy coping are: - Problem-solving and goal setting skills: Finding a problem and challenges, thinking of alternatives for dealing with them, testing those
Sex Determination - Reproduction Sex, whether an individual will be a male or a female is determined at fertilisation, and this directs and controls all the later processes i
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