Q13 of 287 Page 362

Why is life on Mars and Venus planets not possible?

Life is not possible on Mars and Venus because these planets have 95-97% of carbon dioxide and no oxygen to sustain life.


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11

What percentage of carbon dioxide is present in the atmosphere?

 12

What is air?

 14

Name the two important biological processes in which air is essential.

 15

Name the gas which has the highest percentage in air.