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AQA A-Level Biology
4. Genetic Information, Variation, and Relationships Between Organisms
4.5 Biodiversity
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What does biodiversity refer to in a given area?
Variety of living organisms
Genetic diversity refers to the variety of genetic information within a
species
.
True
Genetic biodiversity refers to the variety of genetic information within a
species
Habitat destruction reduces the available space and resources for
species
Invasive species outcompete native species for resources, reducing
biodiversity
.
True
Species biodiversity supports the resilience of ecosystems, allowing them to better adapt to
changes
Genetic biodiversity enables species to resist diseases more effectively.
True
What ecosystem service does ecosystem biodiversity ensure?
Water purification
Match the level of biodiversity with its definition:
Species diversity ↔️ The number and variety of different species in an area
Genetic diversity ↔️ The variety of genetic information within a species
Ecosystem diversity ↔️ The variety of different ecosystems
What type of biodiversity is exemplified by a rainforest ecosystem with diverse plants and animals?
Species biodiversity
What is the primary impact of habitat destruction on biodiversity?
Reduces species diversity
How do invasive species affect biodiversity?
Outcompete native species
Order the levels of biodiversity from highest to lowest impact on ecosystem stability.
1️⃣ Ecosystem biodiversity
2️⃣ Species biodiversity
3️⃣ Genetic biodiversity
Species diversity is the number and variety of different species in an
area
What is an example of ecosystem diversity?
Variety of ecosystems
Species biodiversity is illustrated by a rainforest ecosystem with
diverse
plants and animals.
True
What is an example of ecosystem biodiversity?
Variation between ecosystems
Order the factors affecting biodiversity from most to least direct impact:
1️⃣ Habitat destruction
2️⃣ Pollution
3️⃣ Climate change
4️⃣ Invasive species
5️⃣ Overexploitation
Why is ecosystem biodiversity important?
Maintains ecosystem stability
What does species biodiversity contribute to ecosystems?
Resilience
Ecosystem biodiversity maintains the stability and functioning of
ecosystems
Define biodiversity in a single sentence.
Variety of living organisms
Provide an example of genetic biodiversity.
Different breeds of dogs
The variation between desert, grassland, and forest ecosystems is an example of
ecosystem
biodiversity.
Climate change can force species to adapt or
migrate
.
True
What is the potential outcome of overexploitation of a species?
Extinction
Match the conservation strategy with its impact on biodiversity:
Protected areas ↔️ Maintains ecosystem stability
Habitat restoration ↔️ Rebuilds ecosystems
Species reintroduction ↔️ Restores ecological balance
What does species reintroduction aim to achieve?
Rebuild endangered populations
Protected areas help preserve habitats and maintain
ecosystem
stability.
Implementing multiple conservation strategies is essential for maintaining
biodiversity
.
True
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