Vidaara.orgClass 12 · Mathematics
CodeVID-M12-WS
Biodiversity and Conservation — Practice Worksheet
Name: ____________________
Roll No.: __________
Date: ____________
General Instructions
- All questions are compulsory.
- Choose the correct option (A, B, C or D) for each question.
- The answer key is at the end — try the paper first!
Section A — Multiple Choice (1 mark each)
17 × 1 = 17 marks
1.
Biodiversity means the:
- A.Variety of life on Earth
- B.Number of rivers
- C.Amount of rainfall
- D.Height of mountains
2.
Variety of genes within a species is:
- A.Genetic diversity
- B.Species diversity
- C.Ecosystem diversity
- D.Habitat loss
3.
Variety of different species in a region is:
- A.Genetic diversity
- B.Species diversity
- C.Ecosystem diversity
- D.Pollution
4.
Biodiversity is greatest:
- A.At the poles
- B.In the tropics (near the equator)
- C.In deserts only
- D.On glaciers
5.
Which is an importance of biodiversity?
- A.Provides food and medicines
- B.Causes pollution
- C.Destroys soil
- D.Stops rain
6.
A species at risk of dying out is:
- A.Extinct
- B.Endangered
- C.Invasive
- D.Common
7.
A species that has completely disappeared is:
- A.Endangered
- B.Extinct
- C.Native
- D.Abundant
8.
The biggest cause of biodiversity loss is:
- A.Habitat loss and fragmentation
- B.Too much sunlight
- C.Planting trees
- D.Clean water
9.
Species introduced from elsewhere that harm native species are:
- A.Invasive (alien) species
- B.Producers
- C.Decomposers
- D.Pollinators
10.
Using a resource faster than it can recover is:
- A.Over-exploitation
- B.Conservation
- C.Pollination
- D.Photosynthesis
11.
Protection and wise use of biodiversity is:
- A.Conservation
- B.Extinction
- C.Deforestation
- D.Over-fishing
12.
Protecting species in their natural habitat is:
- A.In-situ conservation
- B.Ex-situ conservation
- C.Extinction
- D.Migration
13.
National parks and wildlife sanctuaries are examples of:
- A.In-situ conservation
- B.Ex-situ conservation
- C.Pollution
- D.Invasive species
14.
Zoos, botanical gardens and seed banks are examples of:
- A.In-situ conservation
- B.Ex-situ conservation
- C.Habitat loss
- D.Over-exploitation
15.
Particularly rich, threatened areas given high conservation priority are:
- A.Biodiversity hotspots
- B.Deserts
- C.Cities
- D.Highways
16.
The IUCN record of species and their conservation (threatened) status is the:
- A.Red Data Book
- B.Ramsar list only
- C.Telephone directory
- D.Seed bank
17.
Forest patches traditionally protected by local communities for religious reasons are:
- A.Sacred groves
- B.National parks
- C.Ramsar sites
- D.Zoos
Section B — Challenge / Olympiad (2 marks each)
7 × 2 = 14 marks
18.
In-situ conservation is generally preferred over ex-situ because it:
- A.Protects the whole ecosystem, not just one species
- B.Is always cheaper
- C.Needs no land
- D.Removes animals from the wild
19.
Loss of one plant species can cause co-extinctions because:
- A.Animals that depend on it may also die out
- B.It produces no oxygen
- C.It increases rainfall
- D.It has no genes
20.
Seed banks are a valuable ex-situ tool because they:
- A.Store the genetic material of many plant varieties safely for the future
- B.Grow forests instantly
- C.Kill pests
- D.Replace national parks
21.
A diverse ecosystem usually recovers better from disturbance than a simple one because:
- A.More species provide backup roles and stability
- B.It has fewer organisms
- C.It has no producers
- D.It needs no energy
22.
Refusing to buy ivory or fur products helps conservation by reducing:
- A.The demand that drives illegal hunting of endangered animals
- B.The number of national parks
- C.Rainfall
- D.Oxygen
23.
Tropical rainforests are conservation priorities (hotspots) mainly because they:
- A.Hold very high biodiversity yet face severe threat
- B.Have no species
- C.Are deserts
- D.Are easy to replace
24.
Sacred groves illustrate that biodiversity conservation can also come from:
- A.Traditional and cultural community practices
- B.Only modern laws
- C.Cutting forests
- D.Building cities
Answer Key
Section A — Multiple Choice (1 mark each)
- (A) Variety of life on Earth
- (A) Genetic diversity
- (B) Species diversity
- (B) In the tropics (near the equator)
- (A) Provides food and medicines
- (B) Endangered
- (B) Extinct
- (A) Habitat loss and fragmentation
- (A) Invasive (alien) species
- (A) Over-exploitation
- (A) Conservation
- (A) In-situ conservation
- (A) In-situ conservation
- (B) Ex-situ conservation
- (A) Biodiversity hotspots
- (A) Red Data Book
- (A) Sacred groves
Section B — Challenge / Olympiad (2 marks each)
- (A) Protects the whole ecosystem, not just one species
- (A) Animals that depend on it may also die out
- (A) Store the genetic material of many plant varieties safely for the future
- (A) More species provide backup roles and stability
- (A) The demand that drives illegal hunting of endangered animals
- (A) Hold very high biodiversity yet face severe threat
- (A) Traditional and cultural community practices
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