Q5 of 75 Page 441

Write true or false for the following statements :

Another process that adds to the CO2 in the atmosphere is the process of photosynthesis where fuels are burnt to provide energy for various needs.

False

Photosynthesis is the process in which complex sugars are formed with the help of carbon-di-oxide and water, while oxygen is being released.


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3

Write true or false for the following statements :

Oxygen is necessary to life for most of the organisms in the process of respiration but some forms of life, especially bacteria, are poisoned by elemental oxygen.

 4

Write true or false for the following statements :

Carbon dioxide is one of the greenhouse gases.

 6

Write true or false for the following statements :

Plants generally take up nitrates and nitrites and convert them into amino acids which are used to make carbohydrates.

 7

Write true or false for the following statements :

Nitrogen gas makes up 78% of our atmosphere and nitrogen is also a part of many molecules essential to life like proteins, nucleic acids (DNA and RNA) and some vitamins.