RRB GROUP D Biology Quiz - 27

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Question 1:

Which of the following is branch of botany?

Question 2:

Which of the following are called scavengers of ecosystems?

Question 3:

Process of digestion is helped by ?

Question 4:

Biological Oxygen Demand (BOD) is a standard criterion for :

Question 5:

Which of the following branches of Biology is concerned with the effects of radiation on living organisms?