Question

Choose the correct alternative and fill in the blank. Write complete sentence in the answer sheet
1.Garbage is converted into ________ by microorganisms
(Minerals, fertilizers, Proteins)
2.Muscles of the heart are ________ muscles
(Ordinary, voluntary, cardiac)
3.The process of fermentation is used for making _______________
(Yoghurt, bhakari, pickle)
4.Stretching of spring is a_________ change
(Chemical, physical, natural)

Answer 1

Hint: We know that the garbage cannot be converted to proteins and muscles of the heart are delicate, so it cannot be ordinary. Also, the bhakri is a type of millet or grain used to make bread. Stretching of spring cannot be a chemical change.

Complete answer:
Microorganisms can be found everywhere as they can survive in every type of environment. For instance, they are found in water, air, the body of plants and animals, etc. Furthermore, they can sustain in extreme conditions that prevail in deserts, equators, freezing water bodies, etc. and can adapt accordingly. For the first question, we have already identified that the answer is not protein. The remaining option is minerals and fertilizers.
1.Microorganisms have the ability to convert the vegetable, fruit waste and other biodegradable waste into organic manure or fertilizers. So, the answer is Fertilizers. Garbage is converted to fertilizers by microorganisms.
2.Coming to the second question, we have already identified that the answer is not ordinary muscle. Heart muscles are governed by the cardiovascular system. Heart muscles are very delicate, composed of layer called pericardium Therefore, the heart muscles should be cardiac muscles. Muscles of the heart are cardiac muscles.
3.or the third question, bhakri is not made by fermentation. Pickles are made by dried vegetables and preserved by adding salt and vinegar. Yoghurt is obtained by the fermentation of milk and milk products. So, the answer is yoghurt. The process of fermentation is used for making yoghurt.
4.Coming to the last question, stretching of spring is not a chemical reaction. Stretching of spring does not occur by nature. Stretching of spring occurs when someone forcefully stretches them. Therefore, it’s a physical action. Stretching of spring is a physical change.

Note:
Remember that some of the most common types of microorganisms include bacteria, fungi, algae and protozoa. Contrary to popular belief, viruses are different when compared to other microbes. The point of difference lies in how they reproduce and multiply over time. To elaborate, viruses reproduce within the cells of the host organism, which can be a bacterium, plant or animals.