Q3 of 50 Page 476

Disposable plastic plates should not be used because:

Disposable plastic plates are made of non-degradable materials. Materials made of Plastic cannot be degrade or decomposed by mroorganisms such as bacteria and fungi.

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1

Organisms of a higher trophic level which feed on several types of organisms belonging to a lower trophic level constitute the:

 2

Flow of energy in an ecosystem is always:

 4

Depletion of ozone is mainly due to:

 5

Organisms which synthesise carbohydrates from inorganic compounds using radiant energy are called: