Question

Que 1. Fill in the blanks (5M) 1. Damaged seeds would __________ on top of the water. 2. Alcohol is produced with the help of ________ 3. Grains store on large scale in ___________ and ___________ 4.cholera is caused by _____________ Que 2. Answer the following questions. (5M) 1. Define:- Fermentation 2.What are four major groups of micro-organisms? 3. Write the name of kharif crop. 4. Name any two food items that are prepared using yeast. 5. Write the two names of antibiotics. Que.3. Answer the following questions 1.Differentiate between fertilizers and manures (2M) 2.Draw the well lebelled diagram of plough (2M) 3.Write any five uses of microorganisms in our lives. (3M) 4. What are irrigation? Describe any one method of irrigation which conserve water (3M)​

Answer 1

Answer:

Q1. Fill in the blanks-

1. float
2. yeast
3. jute bag and metallic bin
4. ingestion of food and water cantaminated with the bacteria

Q2. Answer the following questions-

1. Fermentation is a metabolic process that produces chemical changes in organic substrates through the action of enzymes.
2. Virus, Bacteria, Fungi and Archaea
3. Rice, Maize and Cotton
4. Bread and Wine
5. Penicillin and Cephalosporin

Explanation:

Q3. Answer the following questions-

1. Fertilizers are inorganic substances manufactured in factories. whereas. Manure is an organic substances that is obtained from decomposition of vegetables and animal waste.
2. above all answers
3. 1. Lactobacillus used to form curd into milk.

2. Yeast in making bread.

3. Used in winemaking, baking etc.

4. Microbes are used to reduce pollution.

5. Certain microbes are also used in the biological treatment of sewage

4. The artificial method of watering the plants for assisting in their growth is called irrigation. Any one method of irrigation which conserve water is drip system. Drip system- In this system, the water falls drop by drop just at the position of the roots.