Which of the following microorganisms cannot multiply on their own?

What are the harmful effects of algae ?

Which of the following is/are green algae ?

What are the uses of algae ?

Microbes are an important part of the environment because they _________________.

What are the disadvantages of microorganisms ?

Which of the following organisms is considered to be on the borderline of living and non-living ?

Where can viruses reproduce?

Which of the following are correct :

(a) Removal of dead bodies by the action of microbes keeps our planet clean.

(b) Bacteria are also used in sewage treatment, where they help in the decay of waste organic matter.

Which of the following are correct ?

(a) Antibiotics are also used to control microbial diseases in animals and plants.

(b) The antibodies fight and destroy the disease-causing microbe and remain in the body to fight future infections by the same microbe.

(c) When a vaccine is introduced in the body of a healthy person (by swallowing or injection), his/her body produces antibodies against these killed or weakened microbes.