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Ordinary osmosis cannot be used to purify water. If the applied pressure exceeds osmotic pressure then water starts moving from solution side to pure solvent side. This is reverse osmosis, by which pure water is squeezed out of impure water.
Advantage: this process removes lead, calcium, magnesium, sodium, chloride, nitrate, sulphate, etc.
Disadvantages: it requires large volume of water. It may take as much as 90 gallons of water to recover 5 gallons of usable water.
What are the two divisions of the angiosperms? The angiosperms are separated into monocotyledonous and dicotyledonous. (These categories are defined later in this text.) Pla
How are the male gametophytes and the male gametes formed in angiosperms? In the anthers of every stamen there are pollen sacs. Within the pollen sacs there are microspore moth
Characteristics Protozoa and examples
1. In which layer of skin are follicles usually found? 2. How are sebaceous glands associated with hair follicles? 3. In which layer of skin are sweat glands usually located?
Explain the effect of Deficiency of pyridoxine? A deficiency of vitamin B6 alone is uncommon because it usually occurs in association with a deficit in other B-complex vitamin
Relative to carrying capacity, what may result from unbridled continued growth of our population.
Why Physical Fitness is Tested? 1) To assess pre-training fitness status: Before beginning an exercise programme and allow the exercise, intensity and duration to be set at th
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FUNCTIONS (1 ) Intracellular digestion - Individual cells may obtain food through phagocytosis. The same is digested with the help of lysosomes. It is of two types:-
Plot the amount of DNA in the nucleus of a spermatogonia from the G1 stage prior to the first meiotic division through the completion of meiosis. Label each of the major stages of
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