NDA Ecology and Environment questions with solutions
Ecosystems, biomes, pollution and energy resources. 24 questions from our 2016–2025 NDA pattern papers, from the Class 12 Biology syllabus. Each has the answer and a full solution.
NDA 2025
- In a food chain, 10,000 J of energy is available at the producer level. According to the 10 per cent law, the energy available to the tertiary…
- Acid rain is caused mainly by the atmospheric release of oxides of
- The poisonous gas in vehicle exhaust that combines with haemoglobin of blood more strongly than oxygen is
NDA 2024
- Biogas: 1. Its main constituent is methane. 2. It is produced by the aerobic decomposition of cattle dung.
- According to the ten per cent law of energy flow in an ecosystem, the energy available at the next trophic level is about
- Wastes is biodegradable?
- A very high value of Biochemical Oxygen Demand (BOD) in a water sample indicates
NDA 2023
NDA 2022
NDA 2021
NDA 2020
- In a food chain, grass -> grasshopper -> frog -> snake, if the grass has 10000 J of energy available, the energy available to the snake according to…
- Nitrogen-fixing bacteria living in the root nodules of leguminous plants belong to the genus
- The main constituent of biogas produced from cattle dung is
NDA 2019
NDA 2018
- The ozone layer is mainly depleted by
- The ozone layer absorbs harmful ultraviolet radiation from the Sun. 2. The ozone layer is located mainly in the troposphere.
- In a food chain, 10000 J of energy is available at the producer level. Assuming the 10 percent law, the energy available to the tertiary consumer is
NDA 2017
NDA 2016
Other General Knowledge topics
Current Affairs 37Indian Economy 36Constitution and Fundamental Rights 46Parliament, Executive and Judiciary 23Ancient India 36Medieval India 28Freedom Struggle 50Modern India and British Rule 41World Geography 29Indian Geography 81Physical Geography 31Units and Measurements 11Motion, Forces and Gravitation 40Work, Energy and Power 7Fluids and Pressure 10Heat and Thermal Physics 8Sound and Waves 16Light and Optics 37Current Electricity 20Magnetism and Electromagnetic Induction 17Nuclear and Modern Physics 9Atomic Structure, Periodic Table and Bonding 31Acids, Bases and Salts 13Metals, Alloys and Corrosion 20Carbon and Organic Chemistry 22Chemical Reactions 12Mole Concept and States of Matter 13Chemistry in Everyday Life 16Cell Biology and Classification 18Genetics and Heredity 13Plant Physiology 21Nutrition, Diseases and Health 28Human Physiology 62