Biology MCQs
Practice free Biology multiple-choice questions with instant answer feedback and step-by-step solutions. Click an option to check yourself, reveal the full explanation, and work through all 1146 questions — no login required.
Question 1054medium
In plants, photosynthesis mainly occurs in the
Question 1055hard
Which one is important in photosynthesis to allows plants to absorb energy from light?
Question 1056medium
Photosynthesis occurs in
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Question 1057hard
Sulphur Dioxide pollution is indicated by an excessive growth of which of the following?
Question 1058easy
Food wrapped in news paper is likely to get contaminated by
Question 1059hard
What is full form of BOD?
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Question 1060easy
The non-biotic pollutant of underground water is
Question 1061medium
Which group of organisms serves as the best indicator of pollution in a water body?
Question 1062hard
In female a small portion oviduct is removed and cut end is ligated by surgical operation is called