Question

Que.11 What are the weeds? How can we control them?
Que.12 The most common carrier of communicable disease is
Que.13 Give one example of antibiotic.
Que.14 The process of conversion of sugar into alcohol is called
Que.15 Can microorganisms be seen with the naked eye?
Que.16 Name the microorganisms which can fix atmospheric nitrogen in the soil.
Que.17 What are antibiotics?
Que.18 What are the major groups of microorganisms? Write their name.
Que.19 Write 10 lines on the usefulness of microorganisms in our lives.
Que.20 Write a short paragraph on the harms caused by microorganisms.​

Answer 1

Answer:

1Tilling before sowing of crops helps in the uprooting and killing of weeds. Which may dry up and get mixed with soil. Weeds are also controlled by using certain chemicals, called weedicides. Weedicides are sprayed in the fields to kill the weeds.