Question

Choose the correct option.

1. Which is pesticide?

(a) 2, 4-dichlorophenoxyacetic acid

(b) Malathion

(c) Metolachlor

(d) Chloroform

2. The agricultural instrument used for removal of weed is

(a) sickle

(b) khurpi

(c) seed drill

(d) plough

3. The chemical substances rich in nutrients are called

(a) fertiliser

(b) weedicide

(c) pesticides

(d) herbicides

4. Combine is used for:

(a) sowing of seeds

(b) harvesting the crops

(c) threshing

(d) harvesting and threshing both.

5. Examples of kharif crops are

(a) Wheat and maize

(b) Gram and maize

(c) Paddy and maize

(d) All of these.

6. What helps in the rise of bread or dosa dough?

(a) Heat
(b) Grinding

(c) Growth of yeast cells

(d) Low pressure

7. The microorganism which contains chlorophyll

(a) Virus

(b) Fungus

(c) Algae

(d) All

8. The rod shaped bacteria are called

(a) Bacillus

(b) Coccus

(c) Vibrio

(d) Spirillum

9. Bacteria are organisms.

(a) multicellular

(b) unicellular

(c) bicellular

(d) tricellular

10. Medicine that kills or stops the growth of harmful disease-causing
microbes is known as

(a) antibiotic

(b) antibody

(c) antigen

(d) vaccine​

Answer 1

Answer:

a,d,a,d,b,a,d,c,a,d are the answer.

Answer 2

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1. Which is a pesticide?

(a) 2, 4-dichlorophenoxyacetic acid

(b) Malathion ✓

(c) Metolachlor

(d) Chloroform

Know more :

• Those types of substances that are used to control pests are called Pesticides. Examples of Pesticides are Malathion, Metaldehyde, and Propoxur, etc.

2. The agricultural instrument used for removal of weed is

(a) sickle

(b) khurpi ✓  

(c) seed drill

(d) plough  

Know more :

• Khurpi is a tool that is used in fields and farms to weeds from the soil.

3. The chemical substances rich in nutrients are called

(a) fertiliser ✓

(b) weedicide

(c) pesticides

(d) herbicides

Know more :

• A chemical substance that is used to increase soil fertility is known as Fertiliser.

4. Combine is used for:

(a) sowing of seeds

(b) harvesting the crops  

(c) threshing

(d) harvesting and threshing both. ✓

Know more :

• A Combine is a machine that is used to harvest the grain crops and it threshes the crops as well. Another name for Combine is Harvester.

5. Examples of kharif crops are

(a) Wheat and maize

(b) Gram and maize

(c) Paddy and maize ✓

(d) All of these.

Know more :

• Crops that are grown in the rainy season, which is from June to September are called Kharif Crops. Examples are Paddy, Maize, Soyabean, and Groundnut.

6. What helps in the rise of bread or dosa dough?

(a) Heat

(b) Grinding

(c) Growth of yeast cells ✓  

(d) Low pressure

Know more :

• Yeast reproduces rapidly and it produces Carbon Dioxide during the process. And the bubbles of the gas increase its volume.

7. The microorganism which contains chlorophyll

(a) Virus

(b) Fungus

(c) Algae ✓

(d) All

Know more :

• The microorganism which contains chlorophyll is called Algae. Algae is mostly found in Ponds.

8. The rod-shaped bacteria are called

(a) Bacillus ✓

(b) Coccus

(c) Vibrio

(d) Spirillum

Know more :

• The rod-shaped bacteria are called Bacillus. The plural of Bacillus is Bacilli.

9. Bacteria are organisms.

(a) multicellular

(b) unicellular ✓  

(c) bicellular

(d) tricellular

Know more :

• Bacteria is one type of microorganisms. And it is unicelluar.

10. Medicine that kills or stops the growth of harmful disease-causing  microbes is known as

(a) antibiotic ✓

(b) antibody

(c) antigen

(d) vaccine​

Know more :

• Medicine that kills or stops the growth of harmful disease-causing microbes is known as Anitibiotics. Examples of Antibiotics are Penicillins and streptomycin.