Chapter 15: Biodiversity & Conservation

NCERT Solutions for CBSE Class 10 Biology — 24 solved questions with detailed explanations.

Questions

Topics

Solved Questions

Q1. Ex-situ conservation includes:

National parks
Wildlife sanctuaries
Botanical gardens and zoos
Biosphere reserves

Difficulty: Easy · Topic: Conservation

Solution

Ex-situ: conservation outside natural habitat (zoos, botanical gardens, seed banks, cryopreservation).

Q2. Alpha diversity is:

global diversity
diversity within a community
between communities
genetic diversity

Difficulty: Easy · Topic: Biodiversity & Conservation

Solution

diversity within a community.

Q3. Beta diversity is:

diversity between communities
species diversity
global diversity
within a community

Difficulty: Easy · Topic: Biodiversity & Conservation

Solution

diversity between communities.

Q4. IUCN Red List categorizes species by:

diet
size
habitat
extinction risk

Difficulty: Easy · Topic: Biodiversity & Conservation

Solution

extinction risk.

Q5. In-situ conservation includes:

botanical gardens
national parks and sanctuaries
zoos
seed banks

Difficulty: Easy · Topic: Biodiversity & Conservation

Solution

national parks and sanctuaries.

Q6. Sacred groves are examples of:

destructive practice
government conservation
community-based conservation
no conservation

Difficulty: Easy · Topic: Biodiversity & Conservation

Solution

community-based conservation.

Q7. CFC stands for:

Chlorine-free carbons
none
Carbon fluoride compounds
Chlorofluorocarbons

Difficulty: Easy · Topic: Environment

Solution

Chlorofluorocarbons.

Q8. Greenhouse gases include:

only N₂O
only CH₄
only CO₂
CO₂, CH₄, N₂O, CFCs

Difficulty: Easy · Topic: Environment

Solution

CO₂, CH₄, N₂O, CFCs.

Q9. Kyoto Protocol deals with:

ozone depletion
biodiversity
hazardous waste
greenhouse gas reduction

Difficulty: Easy · Topic: Environment

Solution

greenhouse gas reduction.

Q10. CITES deals with:

trade in endangered species
pollution
ozone
climate change

Difficulty: Easy · Topic: Environment

Solution

trade in endangered species.

Q11. Ramsar Convention is about:

desert conservation
forest conservation
ocean conservation
wetland conservation

Difficulty: Easy · Topic: Environment

Solution

wetland conservation.

Q12. Hotspot with most endemic species in India is:

Western Ghats
Himalayas
Eastern Ghats
Thar desert

Difficulty: Easy · Topic: Biodiversity & Conservation

Solution

Western Ghats.

Q13. India is a:

moderate only
no diversity
megadiversity country (top 12)
low diversity

Difficulty: Easy · Topic: Biodiversity & Conservation

Solution

megadiversity country (top 12).

Q14. India has approximately:

10 each
45000 plant species and 91000 animal species
1000 each
100 each

Difficulty: Easy · Topic: Biodiversity & Conservation

Solution

45000 plant species and 91000 animal species.

Q15. Genetic diversity means:

ecosystem variation
variation at gene level within species
species variation
no variation

Difficulty: Easy · Topic: Biodiversity & Conservation

Solution

variation at gene level within species.

Q16. Species diversity means:

ecosystem variation
no variation
gene variation
number and variety of species in area

Difficulty: Easy · Topic: Biodiversity & Conservation

Solution

number and variety of species in area.

Q17. Ecosystem diversity means:

species variation
variety of ecosystems in region
no variation
gene variation

Difficulty: Easy · Topic: Biodiversity & Conservation

Solution

variety of ecosystems in region.

Q18. Rivet popper hypothesis was given by:

Edward Wilson
Paul Ehrlich
Robert May
Tilman

Difficulty: Easy · Topic: Biodiversity & Conservation

Solution

Paul Ehrlich.

Q19. Species-area relationship: larger area has:

no relationship
fewer species
more species (S=cA^z)
same species

Difficulty: Easy · Topic: Biodiversity & Conservation

Solution

more species (S=cA^z).

Q20. Red Data Book lists:

common species
all species
endangered and threatened species
extinct only

Difficulty: Easy · Topic: Biodiversity & Conservation

Solution

endangered and threatened species.

Q21. Biosphere reserves have:

core, buffer, transition zones
only buffer
only core
no zones

Difficulty: Easy · Topic: Biodiversity & Conservation

Solution

core, buffer, transition zones.

Q22. The term 'biodiversity' was coined by:

Edward Wilson
Walter Rosen
Paul Ehrlich
Robert May

Difficulty: Easy-Medium · Topic: Biodiversity

Solution

Walter Rosen coined 'biodiversity' in 1985. Edward O. Wilson popularized it.

Q23. A biodiversity hotspot must have at least:

500 endemic species of plants
1500 endemic species of vascular plants
5000 endemic species
100 endemic species

Difficulty: Easy-Medium · Topic: Hotspots

Solution

Biodiversity hotspot criteria (Myers): ≥1500 endemic vascular plant species AND ≥70% habitat loss.

Q24. Species-area relationship: S = cA^z, typical z value is:

0.01
5-10
1-2
0.1-0.3

Difficulty: Easy-Medium · Topic: Biodiversity & Conservation

Solution

0.1-0.3.

Other Chapters in Biology

Ch 1: Reproduction in Organisms Ch 2: Sexual Reproduction in Plants Ch 3: Human Reproduction Ch 4: Reproductive Health Ch 5: Principles of Inheritance Ch 6: Molecular Basis of Inheritance Ch 7: Evolution Ch 8: Human Health & Disease Ch 9: Strategies for Enhancement Ch 10: Microbes in Human Welfare Ch 11: Biotechnology Principles Ch 12: Biotechnology Applications Ch 13: Organisms & Populations Ch 14: Ecosystem Ch 16: Environmental Issues

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