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Excretion in Protozoans
Excretion of metabolic wastes is dope almost exclusively by diffusion. All protozoans are ammonotelic i.e., the end product of their nitrogen metabolism is ammonia, which is readily diffused in the surrounding medium.
Figure: a) Parumecium with cytopharynx, food and contractile vacuoles and nuclei b) Enlarged section of a contractile vacuole in Paramecium which collects water and expels it outside, performing osmoregulatory functions
There are three methods of collections: 1. Kerbside collection: In this collection system the refuse is brought in containers and placed on the footway, from where it is
Explain the Swab Method? Swab method is the oldest and widely used method in food and dairy industry and was developed by W.A. Manheimer and T. Ybanez in 1917. A sterile cotton
All the water used in the home that goes into the drain or into sewage collection system is called waste water. Domestic sewage is the waste water from kitchens, bathrooms etc. It
The effect of light on the growth of stems (a) Plant some seeds that grow rapidly like as oats, radish, bean or mustard seeds in two flower pots. When the seedlings are about
In 2003 nearly 70 million hectares globally were planted in genetically modi?ed crops. Of these, 73% were plants such as soybean, corn and cotton, which were modi?ed to be he
How different are the respiration in fishes and the respiration in adult amphibians? In fishes gas exchange is completed by direct contact of water with the branchiae (gills).
Q. What is the major transformation presented by the glomerular filtrate in comparison to the blood? Glomerular filtrate is the name given to the plasma after it has entered th
Q. Why can the amphibian circulation be classified as incomplete and double? The amphibian circulation is double because it is composed of pulmonary and systemic circulations r
There is no Interphase preceding second meiotic division. There is a brief intervening period called Interkinesis During this period there may be synthesis of some reserve fo
Explain the systemic antibiotic cover The need for systemic antibiotic cover should be considered. The original protocols recommended an antibiotic such as amoxicillin 250 mg
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