[1 Mark Question Answer]

Questions

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5 questions · timed · auto-graded

Question 11 Mark

Give reasons:
Surgical instruments are boiled in water before using them for an operation.

Answer

Surgical instruments are boiled in water before using them for an operation because boiling kills the microorganisms.

Question 21 Mark

Name the bacteria that helps in the formation of curd.

Answer

Lactobacillus

Question 31 Mark

Name the bacterium which causes cholera in human beings.

Answer

Vibrio cholerae causes cholera in human beings.

Question 41 Mark

What are bacteriophages ?

Answer

Viruses which attack bacteria and infect bacterial cells are known as bacteriophages.

Question 51 Mark

Write two examples of filamentous algae.

Answer

Spirogyra and Ulothrix.

[1 Mark Question Answer] - BIOLOGY STD 7 Questions - Vidyadip

BIOLOGY [1 Mark Question Answer]