Chapter 12: Biodiversity and its Conservation — Online MCQ Test
ZOOLOGY · CLASS 12th · Tamil Nadu State Board
Practice Chapter 12: Biodiversity and its Conservation with a free chapter-wise online MCQ test.
This chapter covers: This chapter details levels of biodiversity spatial patterns extinction threats endangered species hotspot regions and in-situ and ex-situ conservation strategies..
AI-generated questions from basic to board-exam level, with instant results and explanations.
Chapter 12: Biodiversity and its Conservation — Important Questions & Answers
Which of the following is the correct level of biodiversity that refers to the variety of species within a particular region?
- A. Genetic diversity
- B. Species diversity
- C. Ecosystem diversity
- D. Ecological succession
Answer: B. Species diversity
Species diversity refers to the number and variety of species present in a region. It is one of the three main levels of biodiversity.
Species diversity refers to the number and variety of species present in a region. It is one of the three main levels of biodiversity.
The biodiversity hotspot concept is mainly associated with regions that are
- A. rich in fossil fuels
- B. high in species richness and under threat
- C. located only in polar areas
- D. free from human interference
Answer: B. high in species richness and under threat
Biodiversity hotspots are areas with very high species richness and high levels of endemism that are also under severe threat of habitat loss.
Biodiversity hotspots are areas with very high species richness and high levels of endemism that are also under severe threat of habitat loss.
Species richness generally increases with
- A. decrease in habitat diversity
- B. increase in habitat heterogeneity
- C. constant temperature only
- D. absence of sunlight
Answer: B. increase in habitat heterogeneity
A greater variety of habitats usually supports more species. Habitat heterogeneity creates more ecological niches.
A greater variety of habitats usually supports more species. Habitat heterogeneity creates more ecological niches.
Why are biodiversity hotspots considered priority areas for conservation?
- A. They have only a few species but many predators
- B. They contain many endemic species facing high threat
- C. They are always located in deserts
- D. They are protected from all human activities
Answer: B. They contain many endemic species facing high threat
Hotspots have a high concentration of endemic species and are under intense threat from habitat destruction. Protecting them helps conserve a large number of unique species.
Hotspots have a high concentration of endemic species and are under intense threat from habitat destruction. Protecting them helps conserve a large number of unique species.
Which statement about extinction is most accurate?
- A. Extinction occurs only due to natural disasters
- B. Species extinction always happens instantly
- C. Human activities can accelerate the extinction rate
- D. Extinction has no relation to habitat loss
Answer: C. Human activities can accelerate the extinction rate
Human activities such as deforestation, overexploitation, and pollution can greatly increase extinction rates. Habitat loss is one of the major drivers of extinction.
Human activities such as deforestation, overexploitation, and pollution can greatly increase extinction rates. Habitat loss is one of the major drivers of extinction.