10th
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- Complete the following conceptual picture with respect to uses. Xanthan gum Weedisides , Toothpaste , pigments , Fertilizers , papers , Chocolates 1
- Microbial enzymes are used instead of chemical catalysts in chemical industry Microbial enzymes are used instead of chemical catalysts in chemical industry because Now a day, instead of chemical catalysts, microbial en... 1
- Enzymes obtained by microbial process are mixed with detergents. Enzymes obtained by microbial process are mixed with detergents because When detergents are mixed with microbial enzymes, they start working... 1
- Use of mutant strains has been increased in industrial microbiology. Use of mutant strains has been increased in industrial microbiology because Mutant strains are genetically improved strains which give highe... 1
- Complete the following conceptual picture. Cleaning Sewage after processing Cleaning , mopping floors , Gardening , Groundwater treatment 1
- Why is it necessary to ban the use of plastic bags? Plastic bags are a very big problem to the environment. They are mostly made of organic polymers which are nothing but long chains of carbon... 1
- Which precautions are necessary for proper decomposition of domestic waste? It is important to take precautions for decomposition of domestic waste or household waste . The containers that held pickles, jams, coffee,... 1
- How the bread and other products produced using baker’s yeast are nutritious? Different types of breads are produced from flour of cereals. Dough is formed by mixing of baker’s yeast – Saccharomyces cerevisiae, water,... 1
- Which are the reasons for increasing the popularity of probiotic products? These are also milk products, but contain active bacteria e.g. Lactobacillus, Acidophilus, Lactobacillus casei, Bifidobacterium bifidum, etc... 2
- Explain the importance of biopesticides in organic farming. Some microbes-containing inoculants are produced by process of fermentation. These inoculants are sprayed on seeds before sowing and some of... 1
- How can the soil polluted by acid rain be made fertile again? Sulphuric acid is present in the acid rain and materials coming out of mines. You know that erosion of metals present in statues, bridges an... 1
- How can the oil spills of rivers and oceans be cleaned? Spilling of petroleum oil occurs in ocean due to various reasons. This oil may prove fatal and toxic to aquatic organisms. It is not easy to... 1
- Which fuels can be obtained by microbial processes? Why is it necessary to increase the use of such fuels? Natural gases such as biogas, ethane, methane can be obtained from the microbial process. It is necessary to use or increase this because it... 2
- Match the pairs ‘A’ group ‘B’ group a. Xylitol 1. Pigment b. Citric acid 2. To impart sweetness c. Lycopene 3. Microbial 'A' group 'B' group a. Xylitol 1. To impart sweetbess b. Citric acid 2. To imart acidity c. Lycopene 3. Pigment d. Nycin 4.Microbial restric... 1
- Rewrite the following statements using correct of the options and explain the completed statements. a. Process of coagulation of milk proteins occurs due to lactic acid. b. Harmful bacteria in like clostridium in the intestine are destroyed... 1
- Answer the following questions by choosing correct option. Answers: a. (1) Collar cells; b. (3) Earthworm; c. (4) Star fish; d. (4) Mammalia a. Collar cells: sponges (Porifera) have special flagellat... 1
- Body temperature of reptiles is not constant. Reptiles are cold-blooded (poikilothermic) animals: they cannot regulate their body temperature, so it changes with the temperature of the s... 1
- Balanoglossus is connecting link between non-chordates & chordates. Balanoglossus is called a connecting link because it shows some characters of non-chordates and some characters of chordates. Chordate-like... 1
- All vertebrates are chordates but all chordates are not vertebrates. All vertebrates have the basic chordate features, but some chordates (urochordates and cephalochordates) do not develop a vertebral column,... 1
- Our body irritates if it comes in contact with jelly fish. Our body gets irritated because the jellyfish has stinging cells called cnidoblasts (cnidocytes) on its tentacles, which inject a toxin into... 1
- Though tortoise lives on land as well as in water, it cannot be included in class- Amphibia. A tortoise is a reptile, not an amphibian, because it does not have the main features of class Amphibia even though it can live on land and... 1
- To which phylum does Cockroach belong? Justify your answer with scientific reasons. Cockroach belongs to the phylum Arthropoda. It shows all the features which are characteristic of this phylum: it shows the presence of join... 1
- Distinguish between butterfly and bat with the help of four distinguishing properties. Butterfly Bat 1. It belongs to the phylum Arthropoda. It belongs to the phylum Chordata and class mammalia. 2. Their characteristic feature... 1
- Write four distinguishing characters of phylum- Echinodermata. Characteristic features of Echinodermata are: they are called echinoderms because calcareous spines are present on the body of these animals... 1