IB Biology HL A4.2 Conservation of Biodiversity Questions

Practise IB Biology HL A4.2 with evidence-led questions on biodiversity loss, conservation priorities, ecosystem threats, restoration and sustainability.

Exam points

explain biodiversity loss and conservation using habitat change, threats and population evidence
analyse conservation data to compare ecosystem, species and genetic biodiversity
evaluate sustainability decisions using ecological evidence, restoration and human impacts

Covered syllabus points

A4.2.1—Biodiversity definition A4.2.2—Current vs. past biodiversity A4.2.3—Anthropogenic species extinction A4.2.4—Ecosystem loss causes A4.2.5—Evidence for biodiversity crisis A4.2.6—Causes of biodiversity crisis A4.2.7—Conservation approaches A4.2.8—EDGE of Existence programme

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Study A4.2 Conservation of biodiversity conceptsOpen the corresponding Concept lesson for explanations, examples and exam connections.

[Maximum number: 3]

(a)

Distinguish between in situ and ex situ conservation.

[ 1 ]

(b)

Outline one reason for the extinction of a named animal species.

[ 1 ]

(c)

State one use of the Simpson index in ecology.

[ 1 ]

[Maximum number: 1]

The North Island giant moa (Dinornis novaezealandiae) went extinct some time between the arrival of humans in New Zealand and the 1800s.

What do scientists believe to be the cause of this extinction?

Deforestation

New diseases

Competition with other megafauna

Overhunting

[Maximum number: 1]

The satellite images show changes in the area covered by forest, much of which is mixed dipterocarp forest, on the island of Borneo in Southeast Asia.

Which human activities are most likely to have caused the changes shown in the map?

Logging and palm oil plantation

Logging and rewilding

Mining and afforestation

Afforestation and palm oil plantation

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Covered syllabus points

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Question (b)

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