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​