Question

1. Why are viruses considered as being at the borderline' between living and non-living things? What is fermentation? How is this process useful in the food and beverage industries? 2. 3. 4. 'In the absence of microorganisms the earth would become a heap of dead plants and animals.' Justify this statement. Munna observes that the yield of wheat, growing in his field, has reduced in the current year. He gets the soil tested and the report confirms the deficiency of one particular nutrient. Accordingly, he is advised to grow peas after harvesting wheat. (i) Name the nutrient found insufficient. (ii) How do you think growing peas will help in replenishing the soil? 5. Why does it take less time to prepare curd in summers as compared to preparing it in winters?​

Answer 1

Viruses are called the borderline of living and non living things as they act as living organisms only when they enter a host body and otherwise act dormant.