Unit 7: Biodiversity and environmental problems questions and answers

Question 1

Which are the three types of biodiversity?

Accepted Answer

Genetic diversity, species diversity and ecosystem diversity

Answer

Direct economic, indirect economic and aesthetic diversity

Answer

Air, water and soil diversity

Answer

Plant, animal and bacterial diversity

Question 2

Why is it important to preserve the genetic diversity of species that humans do not use directly?

Accepted Answer

They are possible sources of desirable genes that might be needed in the future

Answer

They produce all of the oxygen in the atmosphere for other organisms

Answer

They have no value now, so preserving them only costs money

Answer

They are the main cause of pollution in the habitats where they live

Question 3

Stable ecosystems can be changed by which natural causes?

Accepted Answer

The activity of other organisms, climate changes or natural disasters

Answer

Only gene therapy and the release of recombinant DNA

Answer

Only the hunting of animals by humans for their horns

Answer

Only acid rain made from sulphur and nitrogen oxides

Question 4

What does sustainable use mean?

Accepted Answer

Using resources at a rate at which they can be replaced or recycled while keeping the biosphere healthy

Answer

Never using any natural resource so that the biosphere stays unchanged

Answer

Using all resources as fast as possible before other countries use them

Answer

Using only fossil fuels so that plants and animals are left untouched

Question 5

Which natural threats to biodiversity in Somalia are mentioned?

Accepted Answer

Climate change including droughts and floods

Answer

Volcanic eruptions and earthquakes

Answer

Meteor impacts and solar flares

Answer

Heavy snow and ice on the Ogo and Daallo mountains

Question 6

Which is a source of sulphur dioxide in the air?

Accepted Answer

Burning of sulphur based petroleum fuels

Answer

Photosynthesis by green plants in forests and fields

Answer

Melting of ice caps

Answer

Breathing of animals

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