Coal plays a crucial role in India’s economic and industrial growth. Energy source: Nearly 70% of India’s electricity is generated from coal-based thermal power plants. Industrial use: Coal is essential in steel, cement, and chemical industries as a raw material and energy source. Employment and revRead more
Coal plays a crucial role in India’s economic and industrial growth.
Energy source: Nearly 70% of India’s electricity is generated from coal-based thermal power plants.
Industrial use: Coal is essential in steel, cement, and chemical industries as a raw material and energy source.
Employment and revenue: Coal mining provides jobs and contributes significantly to government income through taxes and royalties.
Transport and infrastructure: It supports railway freight and industrial logistics.
Being the most abundant fossil fuel in India, coal ensures energy security and supports economic expansion, though its environmental impact highlights the need for sustainable and cleaner energy alternatives.
Resource availability alone cannot ensure progress. Technological development enables scientific use and value addition of natural resources, while institutional changes like proper policies, training, and management systems help in equitable and efficient utilization. Together, they ensure that resRead more
Resource availability alone cannot ensure progress. Technological development enables scientific use and value addition of natural resources, while institutional changes like proper policies, training, and management systems help in equitable and efficient utilization. Together, they ensure that resource development leads to sustainable economic growth, environmental balance, and improvement in the quality of life for all.
It is completely wrong to say that plants do not produce any excretory products. However, plants use completely different strategies for excretion than those of the animals. They get rid of these wastes in different manner (any two): i. Oxygen, a photosynthetic waste, is removed through stomata. ii.Read more
It is completely wrong to say that plants do not produce any excretory products. However, plants use completely different strategies for excretion than those of the animals. They get rid of these wastes in different manner (any two):
i. Oxygen, a photosynthetic waste, is removed through stomata.
ii. Excess water is removed by transpiration through stomata.
iii. Other metabolic wastes are either stored in dead cells, resins and gums or are removed through falling of old leaves.
iv. Many waste products are stored in cellular vacuoles
The statement that vultures have the least amount of pesticides is false. In fact, they have the highest concentration due to biological magnification, where toxic substances like pesticides increase as we move up the food chain. The reason, however, is true, as vultures occupy the last trophic leveRead more
The statement that vultures have the least amount of pesticides is false. In fact, they have the highest concentration due to biological magnification, where toxic substances like pesticides increase as we move up the food chain. The reason, however, is true, as vultures occupy the last trophic level and receive only 10% of energy from the previous level. But this reason doesn’t explain the assertion. Therefore, the correct relationship between the two statements is false assertion and true reason. The correct option is (D).
The tallness of pea plants is controlled by a gene that produces a specific enzyme responsible for synthesising growth-promoting hormones. The presence of this enzyme results in tall plants, while its absence causes dwarfness. Hence, both the assertion and the reason are true, and the reason correctRead more
The tallness of pea plants is controlled by a gene that produces a specific enzyme responsible for synthesising growth-promoting hormones. The presence of this enzyme results in tall plants, while its absence causes dwarfness. Hence, both the assertion and the reason are true, and the reason correctly explains the assertion. This experiment demonstrates how genes control traits by producing proteins or enzymes that influence the physical characteristics of an organism. The correct option is (A).
Coal is the most important and abundant fossil fuel in India.’ Justify the statement by evaluating the significant role it plays in the growth of the Indian economy in its different forms.
Coal plays a crucial role in India’s economic and industrial growth. Energy source: Nearly 70% of India’s electricity is generated from coal-based thermal power plants. Industrial use: Coal is essential in steel, cement, and chemical industries as a raw material and energy source. Employment and revRead more
Coal plays a crucial role in India’s economic and industrial growth.
Being the most abundant fossil fuel in India, coal ensures energy security and supports economic expansion, though its environmental impact highlights the need for sustainable and cleaner energy alternatives.
See lessWhat is essential for resource development to contribute to overall development?
Resource availability alone cannot ensure progress. Technological development enables scientific use and value addition of natural resources, while institutional changes like proper policies, training, and management systems help in equitable and efficient utilization. Together, they ensure that resRead more
Resource availability alone cannot ensure progress. Technological development enables scientific use and value addition of natural resources, while institutional changes like proper policies, training, and management systems help in equitable and efficient utilization. Together, they ensure that resource development leads to sustainable economic growth, environmental balance, and improvement in the quality of life for all.
See lessUnlike animals, plants do not have any excretory products as they do not eat food. Comment upon the statement with justification.
It is completely wrong to say that plants do not produce any excretory products. However, plants use completely different strategies for excretion than those of the animals. They get rid of these wastes in different manner (any two): i. Oxygen, a photosynthetic waste, is removed through stomata. ii.Read more
It is completely wrong to say that plants do not produce any excretory products. However, plants use completely different strategies for excretion than those of the animals. They get rid of these wastes in different manner (any two):
i. Oxygen, a photosynthetic waste, is removed through stomata.
ii. Excess water is removed by transpiration through stomata.
iii. Other metabolic wastes are either stored in dead cells, resins and gums or are removed through falling of old leaves.
iv. Many waste products are stored in cellular vacuoles
See lessAssertion (A): Vulture will always have the least amount of pesticides in a food chain. Reason (R): Vulture occupies the last trophic level and it gets only 10% of energy of the previous trophic level.
The statement that vultures have the least amount of pesticides is false. In fact, they have the highest concentration due to biological magnification, where toxic substances like pesticides increase as we move up the food chain. The reason, however, is true, as vultures occupy the last trophic leveRead more
The statement that vultures have the least amount of pesticides is false. In fact, they have the highest concentration due to biological magnification, where toxic substances like pesticides increase as we move up the food chain. The reason, however, is true, as vultures occupy the last trophic level and receive only 10% of energy from the previous level. But this reason doesn’t explain the assertion. Therefore, the correct relationship between the two statements is false assertion and true reason. The correct option is (D).
See lessAssertion (A): Tallness of a pea plant is controlled by an enzyme. Reason (R): The gene for that enzyme makes proteins which help the plant to be tall.
The tallness of pea plants is controlled by a gene that produces a specific enzyme responsible for synthesising growth-promoting hormones. The presence of this enzyme results in tall plants, while its absence causes dwarfness. Hence, both the assertion and the reason are true, and the reason correctRead more
The tallness of pea plants is controlled by a gene that produces a specific enzyme responsible for synthesising growth-promoting hormones. The presence of this enzyme results in tall plants, while its absence causes dwarfness. Hence, both the assertion and the reason are true, and the reason correctly explains the assertion. This experiment demonstrates how genes control traits by producing proteins or enzymes that influence the physical characteristics of an organism. The correct option is (A).
See less