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Principles of Ecology. — BIO BOTANY STD 12 — Question

Tamilnadu BoardEnglish MediumSTD 12BIO BOTANYPrinciples of Ecology.2 Marks
Question
Write the composition of gases in atmosphere.
✓

Answer

Nitrogen -78% , Oxygen -21%, Carbon-di-oxide -0.03%, Argon and other gases – 0.93%.

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