Please select a subject first
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Match the pairs.
| ‘A’ group | ‘B’ group |
| 1. Rhizobium | a. Food poisoning |
| 2. Clostridium | b. Nitrogen fixation |
| 3. Penicillium | c. Bakery products |
| 4. Yeast | d. Production of antibiotics |
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Give scientific reasons.
Why are naphthalene balls kept with clothes to be put away?
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Write the name of microbes found in the following food material.
Yoghurt
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Complete the statement using the proper option from those given below. Explain the statement.
Leguminous plants can produce more proteins due to ______.
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Complete the statement using the proper option from those given below. Explain the statement.
Yeast reproduces asexually by the ______ method.
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How does a computer work?
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Fill in the blank to complete the statement. Justify the statement.
While working with a computer we can read the information stored in its memory and perform other actions in ______ memory.
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Write the name of the following tissue.
Tissue joining muscles and bones.
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Identify the odd word and explain why it is odd.
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Why are optical telescopes located in uninhabited places on mountains?
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What are the difficulties in using ground-based optical telescopes? How are they overcome?
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The biggest optical telescope in India is situated at ______.
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Answer the following question in your own words.
What is meant by ‘chromosome’?
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The component which is in the nuclei of cells and carries the hereditary characteristics is called ______.
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Chromosomes are mainly made up of ______.
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The chemical name of baking soda is ______.
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Write the chemical formula.
Baking soda
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Fill in the blank and explain.
The velocity of sound in steel is ______ than the velocity of sound in water.
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The incidence of ______ in daily life shows that the velocity of sound is less than the velocity of light.
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The speed of sound in air at 0°C is 332 m/s. If it increases at the rate of 0.6 m/s per degree, what will be the temperature when the velocity has increased to 344 m/s?
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