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Science · 2022 · 2 marks
CBSE 2022 · Region 2 · Set 3 · Q6
In the following food chain, only 2J of energy was available to the peacocks. How much energy would have been present in Grass ? Justify your answer. GRASS → GRASS HOPPER → FROG → SNAKE → PEACOCKWhat is meant by garbage ? List two classes into which garbage is classified.(b)What do we actually mean when we say that the "enzymes are specific in their action" ?
In the following food chain, only 2J of energy was available to the peacocks. How much energy would have been present in Grass ? Justify your answer. GRASS → GRASS HOPPER → FROG → SNAKE → PEACOCK
What is meant by garbage ? List two classes into which garbage is classified.
(b)
What do we actually mean when we say that the "enzymes are specific in their action" ?
Marking-scheme solution
$\displaystyle 20,000$ J
Only $\displaystyle 10$% usable energy / amount of organic matter is transferred from one trophic level to the next higher trophic level in a food chain and rest $\displaystyle 90$% is lost to the environment as heat.
Waste material generated in day-to-day lives.
Biodegradable and Non-biodegradable substances.
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CBSE Class 10 Science past-paper question from the 2022board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.