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CAIE A-Level Biology 18.3 Conservation Question Bank

Practise conservation questions by explaining extinction risks, justifying biodiversity protection and evaluating protected areas, breeding programmes or trade controls.

Syllabus
2028–2030
Course
Biology 9700
Level
A2

Exam points

  • infer extinction risks from habitat loss, hunting, invasive species, disease or climate change
  • justify biodiversity conservation using genetic, ecological, ethical, economic or research value
  • evaluate protected areas, captive breeding, IVF, IUCN Red List or CITES trade controls

Covered syllabus points

18.3.1—Extinction causes18.3.2—Reasons to maintain biodiversity18.3.3—Ex situ and protected-area conservation18.3.4—Assisted reproduction in endangered mammals18.3.5—Invasive alien species18.3.6—Conservation organisations

18.3 Conservation question 1

[Maximum number: 8]

Question (a)

(a)

The Asian common toad, Duttaphrynus melanostictus, arrived accidentally in eastern Madagascar in 2010 on a ship.

Fig. 9.1 shows an Asian common toad.

Fig. 9.1

Fig. 9.1

The Asian common toad is now regarded as an invasive alien species because:
- it breeds fast in the warm, wet conditions of eastern Madagascar
- it can travel up to 2.5 km per year
- its skin contains poison, which is highly toxic to humans and predators.

Suggest ways in which the Asian common toad may affect the ecosystem of eastern Madagascar.

[ 4 ]

Question (b)

(b)

Zoos work with local groups around the world to help conserve endangered species. One example of this is the use of assisted reproduction, such as IVF, with endangered mammals such as the eastern black rhino.

Outline the process of IVF.

Figure for Question (b) — CAIE A-Level Biology A2
Figure for Question (b) — CAIE A-Level Biology A2
[ 4 ]

18.3 Conservation question 2

[Maximum number: 3]

Bears are several species of mammal in the family Ursidae.
Climate change and loss of habitats due to human activity have reduced the size of some bear populations in recent years.

The International Union for Conservation of Nature (IUCN) has a role in the conservation of species, such as species of bear.

Outline the role of the IUCN in the conservation of species.

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