Give one word answer of the following question
1. How many groups of microorganisms are there?
2. Covid-19 is caused by which type of microorganism?
3. Name the insect which is used as biological weedicides?
4. Name any one example of green manure.
5. Name any one cynobacteria.
6. What is formed during lightning when oxides of nitrogen dissolve in rain water?
7. What is large scale nurseries of fishes called?
8. Name the protozoa which cause malaria?
9. Name the process of separating grains from their husk?
10. Name the bacteria which is responsible for conversion of nitrates into free nitrogen gas.
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Answers
Ans1-
Microorganisms are divided into seven types: bacteria, archaea, protozoa, algae, fungi, viruses, and multicellular animal parasites ( helminths ). But mainly 5 i.e. bacteria,fungi,algae,viruses, protozoa.
Ans2- Viruses.
Ans3-some commonly used weedicides were tested for their safety to the beetle. 'leaves, from drying up during the three day observation period. After the trea,tment, the insects along with leaves were placed ili small perforated polythene covers and their mouths secured with rubber bands to prevent the escape of insects
Ans4-A green manure crop can be cut and them plowed into the soil or simply left in the ground for an extended period prior to tilling garden areas. Examples of green manure crops include grass mixtures and legume plants. Some of the most commonly used are: Annual ryegrass.
Ans5-Free-living cyanobacteria are present in the water of rice paddies, and cyanobacteria can be found growing as epiphytes on the surfaces of the green alga, Chara, where they may fix nitrogen. Cyanobacteria such as Anabaena (a symbiont of the aquatic fern Azolla) can provide rice plantations with biofertilizer. Example - Nostocales.
Ans6-Nitric oxide (NO), which also contributes to the natural acidity of rainwater, is formed during lightning storms by the reaction of nitrogen and oxygen, two common atmospheric gases (Equation 3).
Ans7-pisciculture is the rearing of fishes.
Ans8-Plasmodium
Malaria is caused by the protozoan parasite Plasmodium. Human malaria is caused by four different species of Plasmodium: P. falciparum, P.
Ans9-Husk is separated from heavier seeds of grain by winnowing. Difference in the size of particles in a mixture is utilised to separate them by the process of sieving and filtration. In a mixture of sand and water, the heavier sand particles settle down at the bottom and the water can be separated by decantation.
Ans10-Nitrifying bacteria are those bacteria that those bacteria which convert ammonia to nitrite and nitrite to nitrate. For example, Nitrosomonas, Nitrosococcus, Nitrobacter. Denitrifying bacteria are those bacteria that convert nitrates into nitrites and nitrites into free nitrogen
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One word answers
Explanation:
1. How many groups of microorganisms are there? - Five
2. Covid-19 is caused by which type of microorganism? - Virus
3. Name the insect which is used as biological weedicides? - Beetle
4. Name any one example of green manure. - Ryegrass
5. Name any one cynobacteria. - Oscillatoria
6. What is formed during lightning when oxides of nitrogen dissolve in rain water? - nitric oxide
7. What is large scale nurseries of fishes called? - pisciculture
8. Name the protozoa which cause malaria?- Plasmodium
9. Name the process of separating grains from their husk? - winnowing
10. Name the bacteria which is responsible for conversion of nitrates into free nitrogen gas. - Denitrifying bacteria