✓ Board-verified↻ asked 3×
Science · 2022 · 2 marks
CBSE 2022 · Region 3 · Set 1 · Q1
Kulhads (disposable cups made of clay) and disposable paper cups both are used as an alternative for disposable plastic cups. Which one of these two can be considered as a better alternative to plastic cups and why ?Human beings are most adversely affected by the Biological Magnification. State the reason. Why can ordinary washing of the edibles (fruits and vegetables) not reduce the effect of biological magnification ?
Kulhads (disposable cups made of clay) and disposable paper cups both are used as an alternative for disposable plastic cups. Which one of these two can be considered as a better alternative to plastic cups and why ?
Human beings are most adversely affected by the Biological Magnification. State the reason. Why can ordinary washing of the edibles (fruits and vegetables) not reduce the effect of biological magnification ?
Marking-scheme solution
Disposable paper cups.
Making of Kulhads on a large scale would result in the loss of fertile top soil. /Disposable paper cups can easily decompose and do not pollute the environment.
Human beings occupy the top level in any food chain therefore maximum concentration of these chemicals get accumulated in our bodies.
Harmful chemicals or pesticides get absorbed from the soil by the plants along with water and minerals therefore ordinary washing cannot remove these harmful chemicals.
More from Our Environment
- Assertion: The amount of ozone in the atmosphere began to drop sharply in the 1980s. Reason (R): The oxygen…2025 · asked 3×
- Other than the abiotic components, which of the given biotic components are not required to make an aquarium…2025 · asked 3×
- Use of pesticides to protect our crops affect organisms at various trophic levels especially human beings.…2024 · asked 3×
- Plants → Deer → Lion In the given food chain, what will be the impact of removing all the organisms of second…2024 · asked 3×
- In accumulation of toxic substances at higher trophic levels of an ecosystem through the food chain, which of…2026 · asked 3×
- Differentiate between food chain and food web. In a food chain consisting of deer, grass and tiger, if the…2024 · asked 3×
- Assertion: Use of jute bags for shopping reduces pollution. Reason (R): Jute is biodegradable and its bag may…2025 · asked 3×
- The examples of natural and manmade (artificial) ecosystems are respectively2025 · asked 3×
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.