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Explain the Precautions for Use of Light Microscope?
1. Clean the lens system properly.
2. Use xylol only when necessary.
3. Never lower the body tube while looking through the ocular lens.
4. Use only a drop of immersion oil for oil immersion lens.
5. Focus the slide first at low-power lens using coarse adjustment knob. Then change to other lens in position and focusing should be done only with fine adjustment knob.
6. High power objective lens should not touch the oil drop on slide.
What is the difference between the concepts of food chain and food web? The chain theory is a theoretical model to study the energy flux in ecosystems. In fact, in an ecosystem
Hormones secreted by gonads: 1. Testis and ovary are called gonads in the human body. 2. Apart from producing gametes, gonads also secrete hormones. Testis : Testis s
polyspermic fertilization
What was the experiment of Stanley Miller (1953) on the origin of life? In 1953 the Stanley Miller arranged an experimental apparatus that simulated the atmospheric conditions
How do the sodium and potassium ions maintain the resting potential of the neuron? The plasma membrane of the neuron when at rest maintains an electric potential difference amo
Chromosomes, coloured bodies, are composed of proteins and DNA; so are chromatids. At metaphase I there are 46 chromosomesaligned in pairs along the human cells equatorial plate. A
Q. What is the evolutionary importance of the emergence of seeds in the plant kingdom? The evolutionary significance of the seed is related to the plant capability of distant c
S a f e ty, ethical and welfare considerations Development of transgenic organisms is proceeding in an environment of intense public debate about safety, environmental impa
Cyanotic Heart Disease In this there is a communication between Pulmonary and systemic circulation through which venous blood enters the systemic circulatory system. The infa
what happens to your total peripheral resistance when you go from a warm room to cool outside air
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