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a) What is the special property of a 'persistent' insecticide?
b) In what ways is 'persistence' (i) a useful property, (ii) a harmful property?
(a) A persistent insecticide is chemically stable, i.e. it takes a long time to break down.
(b) (i) This property is useful because the substance will continue to kill insects long after it has been applied.
(ii) 'Persistence' is damaging due to the insecticide lasts long enough to pass up a food chain and become concentrated in the bodies of secondary or tertiary consumers.
Two atoms always represent the same element if they have. A) the same number of particles in the nucleus. B) The same number of electrons. C) The same number of shells. D) The same
State the changes in society which could contribute to a falling death rate. The changes in society which could contribute to a falling death rate are: (i) improvements in
Hi,I am a graduating student from my course BS in Biology major in Zoology. I was wondering if you guys have any great idea of a good thesis title?
RESPIR A T ORY ORGANS IN ANIMALS - In Protozoa plasmalemma functions as respiratory surface. In Porifera, respiration occur through body wall. In Coelentrata resp
BLOOD COAGULATION - DEFINITIO N - The property of blood to change from fluid to gel state within a few minutes of its coming in contact with air is called blood coag
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a) Mention the main cause of air pollution in metro cities. Write any three ways by which it can be decreased. b) How did Eli Lilly synthesize the human insulin? Mention
I want to do assignment on kerb cycle with in text citation
Q. Incineration Treatment technologies for health-care waste? It used to be the method of choice for most hazardous health-care wastes and is still widely used. It is a high te
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