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Why, even though they have an open circulatory system, can flying insects like flies beat their wings with great speed?
In insects the circulatory system is open but this system does not participate in the gas exchange process and in oxygen supply to the tissues. Gases go in and out by the independent tracheal system that permits direct contact of cells with the ambient air. Thus an insect can supply the great oxygen demand of its fast-beating wing muscles even having open circulatory system.
give an account of specific characters of phylum porifera
Cutaneous respiration in earthworm. The respiration performed by the skin is called cutaneous respiration In earthworm skin is the only organ of respiration. The skin
Explain Spread Plate Method - Pure Culture Techniques? In this method, diluted microbial suspension containing about 30 to 300 colonies is spread uniformly on the agar surface
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cellis basic unit of life
Q. Why is it not correct to assert that the DNA self- replicates? The DNA is not completely self-sufficient in its duplication process because the replication does not occur wi
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Why is the number of bonds important in nucleic acids
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