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Holding water in a sieve
Pour some oil over the wire mesh of a kitchen sieve and shake out the overload so that the holes are open. Cautiously pour water into the sieve from a pitcher, letting the water run down the side of the sieve. When the sieve is about half full, hold it over a sink or pail and observes the bottom. You will see the water pushing by the openings but the surface tension keeps it from running by. Touch the bottom of the sieve with your finger and the water should run by.
Explain the Bowman’s capsule - Structures of a Nephron Bowman’s capsule: It contains the primary filtering device of the nephron, that is, glomerulus. It is a double-walled, cu
Another balloon experiment Stretch a rubber balloon over the neck of a little bottle. Place it in the receiver jar and delete some of the air with the pump. What happens? How d
Explain the Physiology of Lactation Lactogenesis is the onset of copious milk secretion around parturition, triggered by a fall in plasma progesterone levels. Although some col
Define relationship of Proteins with Physiology These form building block through their 'amino acids'. They pass through blood stream and go to liver, where they are broken dow
Palaeontological Evidence: Palaeontology is a branch of earth sciences, which is essentially a study of plant and animal life in the past geological periods, millions of ye
who do u put a neddle thrwew a ballon
Explain in brief about the Crop Rotation 1. Deep rooted legumes may be grown periodically over all fields. 2. There is more continuous vegetative cover and probably less e
DISPOSAL OF WASTE MATERIALS : In a school or college science laboratory, chemical wastes, broken glassware, unserviceable non consumable items, obsolete instruments, used biologic
Some Features of the Forests: Forests are the most widespread stretches of vegetation, harbouring diverse kinds of life forms. They are dominated by trees. Besides trees, f
Biochemical Evidence: As we had said earlier in section 13.2, Darwin had recognized that humans and the great apes shared many physical characteristics. This led him to co
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