‹ PrevQuestion 106 / 106 · latest first
✓ Board-verified
Science · 2022 · 3 marks
CBSE 2022 · Region 3 · Set 2 · Q13
Explain the reason why in a food chain (a) the number of individuals decreases as we move from lower trophic level to higher trophic level, and (b)…
Explain the reason why in a food chain
(a)
the number of individuals decreases as we move from lower trophic level to higher trophic level, and
(b)
the flow of energy is unidirectional.
Marking-scheme solution
(a) Since the \(\displaystyle 10 \%\) energy is available from lower trophic level to higher trophic level therefore the number of individuals decreases.
(b) The energy captured by the autotrophs cannot revert back to the solar input / energy once received by herbivores cannot come back to autotrophs
All Our Environment questions2022 question paperNCERT solutions: Our EnvironmentPractice Our Environment →
More from Our Environment
- Assertion (A): Ozone (O_3) gas at higher levels of atmosphere is a product of UV radiation acting on Oxygen (O_2). Reason (R): The amount of ozone in…2026
- Why are the organisms of first trophic level important in any food chain? Justify the following statement: 'The flow of energy in an ecosystem is…2025
- Assertion: Producers are capable of using light energy from the sun to make food available in an ecosystem. Reason (R): All food chains in an…2024
- Assertion: The amount of ozone in the atmosphere began to drop sharply in the 1980s. Reason (R): The oxygen atoms combine with molecular oxygen to…2025
- Other than the abiotic components, which of the given biotic components are not required to make an aquarium with small herbivorous fishes a…2025
- Use of pesticides to protect our crops affect organisms at various trophic levels especially human beings. Name the phenomenon involved and explain…2024
- Explain why food chains generally consist of three or four steps.2026
- Plants → Deer → Lion In the given food chain, what will be the impact of removing all the organisms of second trophic level on the first and third…2024
CBSE Class 10 Science past-paper question from the 2022 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.