Doubtly
@Doubtly · Joined Feb 2021
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- How do antibiotics cause disease? Microorganisms are surviving due to their certain biochemical pathway. Such as in respiration and enzyme synthesis. Antibiotics binds with t... 1
- How is a vaccine produced? Vaccine are nothing but the some dead or weakened organisms which helps the body to fight against the various kinds of diseases. Hence, to p... 2
- Which vaccines are given to infants? Why? The various kinds of vaccines are given to the infants between 0-12 months. Some of them are BCG vaccination, Hepatitis B, Oral Polio vaccin... 1
- Match the pairs. ‘A’ group ‘B’ group 1. Rhizobium a. Food poisoning 2. Clostridium b. Nitrogen fixation 1) Rhizobium: Nitrogen fixation 2) Clostridium: Food poisoning 3) Penicillium: Production of antibiotics 4) Yeast: Bakery products 1
- Write down the modes of infection and the preventive measures against the fungal diseases. Fungal infections are due to the fungi found in soil, water, plants, animals, air and also on the people. Fungal infections are occurred due... 2
- Why are naphthalene balls kept with cloths to be put away. Naphthalene balls are kept with cloths because when they kept in cloths sublime slowly and after sublimation there will be no residue left.... 1
- Foam accumulates on the surface of ‘dal’ kept for long time in summer. Answer: Because microbes (bacteria and fungi) grow in the dal and ferment it, producing gases such as carbon dioxide, which form foam. Cooke... 1
- Identify the odd word out and say why it is the odd one. a) Pneumonia, diphtheria, chicken pox, cholera. Odd word: Chicken pox Because chicken pox is a viral disease while all the other are bacteri... 2
- Write the names of the microbes found in the following food materials. Yoghurt- Lactobacillus Bread -Saccharomyces Root nodules of Leguminous plants - Rhizobium Idli - lactobacillus Dosa - Lactobacillus Spoiled... 1
- Complete the statement using the proper option from those given below. (Mycotoxins, budding, Rhizobium) a) Yeast reproduces asexually by the budding b) Toxins of fungal origin are called mycotoxins. c) Leguminous plants can produce more protein... 1
- What are the differences between flow of matter and of energy in an ecosystem? Why? The major difference between flow of matter and of energy is that the flow of matter occurs in a cyclic manner i.e. it is recycled, however,... 3
- What type of changes occur in the amount of energy during its transfer from plants to apex consumers? (1) Green plants of the ecosystem store large amount of energy in the form of carbohydrates and proteins. (2) Before reaching the decomposer... 1
- State the different types of bio-geochemical cycles and explain the importance of those cycles. The cyclical flow of nutrients within an ecosystem is called the bio-geo-chemical cycle. There are various bio-gio-chemical cycles operating... 1
- Explain in detail the inter-relationship between the food chain and food web. Interaction go on continuously between producers, consumers and decomposers. There is a definite sequence in these interactions which is cal... 1
- What would you do to help maintain the equilibrium in the various bio-geo-chemical cycles? Explain in brief. The cyclical flow of nutrients within an ecosystem is called the bio-geo-chemical cycle. Climatic changes and human activities seriously aff... 1
- Oxygen cycle Explain the following cycles in your own words with suitable diagrams. Oxygen forms 21% of the atmosphere. It is also present in the hydrosphere and lithosphere. Circulation and recycling of oxygen within the bi... 1
- Nitrogen cycle Explain the following cycles in your own words with suitable diagrams. Nitrogen forms 78% i.e. the maximum portion of the atmosphere. It is necessary for the maintenance of the cycle of nature. The circulation a... 1
- Carbon cycle Explain the following cycles in your own words with suitable diagrams. Carbon cycle Carbon enters life forms through the process of photosynthesis. During photosynthesis, carbon dioxide and water combine to prod... 1