Biodiversity is made up of all living organisms, each of which plays an important role in their environment. Furthermore, all components of biodiversity are interdependent and must work together to ensure sustainable living. Biodiversity refers to the biological variety and variability of life on Earth. Biodiversity is a measure of genetic, species, and ecosystem variation. Terrestrial biodiversity is typically higher near the equator owing to the warm climate and high primary productivity. It is not evenly distributed on Earth, and it is more abundant in the tropics.

Class 12 Biology Biodiversity and Conservation MCQs with Answer

Q1. What is common to the following plants: Nepenthes, Psilotum, Rauwolfia and Aconitum?

1. All are ornamental plants.
2. All are phylogenic link species.
3. All are prone to over exploitation.
4. All are exclusively present in the Eastern Himalayas.

Q2. Among the ecosystem mentioned below, where can one find maximum biodiversity?

1. Mangroves
2. Desert
3. Coral reefs
4. Alpine meadows

Q3. Endemism refers to:

1. The distribution of species at a cosmopolitan distribution.
2. Distribution of certain species in a restricted area.
3. A common feature of all organisms seen in the biosphere.
4. A and B are correct.

Q4. Which one of the following is an endangered plant species of India?

1. Rauwolfia serpentina.
2. Santalum album (Sandal wood).
3. Cycas beddonei.
4. All of the.

Q5. Which of the following is a hot-spot of biodiversity in India?

1. Western Ghats.
2. Indo-gangetic plain.
3. Eastern Ghats.
4. Aravalli Hills.

Q6. Hot spots are places of:

1. High degree of species richness.
2. High degree of habitat loss.
3. High degree of endemism.
4. All the above.

Q8. The most important cause of extinction of animals and plants, especially in tropical rain forests is:

1. Habitat loss.
2. Afforestation.
3. Pollution.
4. Soil erosion.

Q9. Which among the following is not a method of in-situ conservation?

1. National Park.
2. Botanical garden.
3. Wildlife sanctuary.
4. Ramsar sites.

Q10. The active chemical drug reserpine is obtained from:

1. Datura
2. Rauwolfia
3. Atropa
4. Papaver

Q11. The one-horned rhinoceros is specific to which of the following sanctuary:

1. Bhitar Kanika.
2. Bandipur.
3. Kaziranga.
4. Corbett park.

Q12. Which one is known as the lungs of the planet?

1. Amazon rain forest.
2. All tropic rain forest.
3. All producers.
4. Deciduous forest

Q13. The extinction of passenger pigeon was due to:

1. Increased number of predatory birds.
2. Over exploitation by humans.
3. Non-availability of the food.
4. Bird flu virus infection.

Q14. Which of the following countries has the highest biodiversity?

1. Brazil
2. South Africa
3. Russia
4. India

Q15. Reserpine is obtained from:

1. Rauwolfia vomitoria.
2. Cinchona officinalis.
3. Taxus brevifolia.
4. Catheranthus roseus.

Q16. Amongst the animal groups given below, which one has the highest percentage of endangered
species?

1. Insects
2. Mammals
3. Amphibians
4. Reptiles

Q17. The Earth Summit (1992) was held at:

1. Johannesburg.
2. South Africa.
3. Rio de Janeiro.
4. Japan.

Q18. From his long term ecosystem experiments, David Tilman showed that.

1. Decreased diversity contributed to higher productivity.
2. Decreased diversity contributed to decreased productivity.
3. Increased diversity contributed to increased productivity.
4. Increased diversity contributed to decreased productivity

Q20. Which of the following organisation is responsible for maintaining the Red Data Book?

1. IDRI
2. IUCN
3. UNESCO
4. USDA

Q21. Which of the following group of plants exhibit more species diversity?

1. Angiosperms
2. Algae
3. Bryophytes
4. Fungi

Q22. Which of the following forests is known as the ‘lungs of the planet Earth’ ?

1. Tiaga forest.
2. Tundra forest.
3. Amazon rain forest.
4. Rain forests of North East India.

Q23. What is common to Lantana, Eichhornia and African catfish?

1. All are endangered species of India.
2. All are key stone species.
3. All are mammals found in India.
4. All the species are neither threatened nor indigenous species of India.

Q24. Which of the below mentioned regions exhibit less seasonal variations?

1. Tropics
2. Temperates
3. Alpines
4. Both (a) & (b)

Q25. The enormous number of varieties of mango in India represents:

1. Genetie diversity.
2. Species diversity.
3. Ecological diversity.
4. Hybridisation programmes.