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Diseases Spread by Insects or Other Carriers:
We know malaria is transmitted by the female Anopheles mosquitoes. Dengue fever and filaria are also caused by mosquito's bite. These insects suck blood and also inject some of it back into the body. Mosquitoes get the germs by sucking the blood of someone suffering from the disease, and transmit them to others when they puncture their skin or '!bitem them. Houseflies are also caniers of germs of intestinal diseases. Simparly many fleas also spread diseases. Rats are reservoir of many diseases. Innumerable. outbreaks of plague were caused by them. Lice, ticks, cockroaches, etc. also carry germs of various diseases. Guinea worm disease is quite common in India. The adult worm is about a metre long and it migrates from the stomach to the leg and produces larvae which are released in water as shown in Fig.
What are decomposers in a temperate deciduous forest? In the Deciduous Forest, many decomposers that are living there contain fungi, bacteria, and yes, even worms.
What are the ratios allowed for three year olds and Child Care Centers in Colorado and what is the citation of the rules that addresses ratios?
Corrosive Substances : These substances cause severe damage by chemical action when in contact with living tissue or in case of leakage, destroy /damage other materials. Mineral a
Poisons : It is essential that all dangerous substances, such as cyanides, are always kept under strict control. Steps to ensure such control are as follows: i) All substances
what is the structure of the ecosystem
What is tha nature and scope of zoology?
An aneroid barometer The corrugated rubber tube from a gas mask, or a cycle grip, can be used to make a model aneroid barometer. No huge accuracy is to be expected due to the m
PROCEDURE Locate the gas cylinders available in the lab. Note the colour of the cylinder (to a maximum of two and exclude the LPG) and bands on it (if any) and record them i
Nuclear Fission: Splitting the Atom You know that atoms are made up of a nucleus and electrons moving around the nucleus, and the nucleus is made up of protons and neutron
Explain the Radioactive Red Blood Cells In order to make red blood cells radioactive, tagging of red blood cells with radioactive chromium ( 51 cr) is done. A small quantity of
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