Ecology

How many trophic levels are there in this food chain?

grass --> mouse -->fox

• 1

• 2

• 3

• 4

What is the kind of pyramid shown in this diagram?

• pyramid of number

• pyramid of biomass

• pyramid of energy

Energy can be lost as heat during ___________ at each trophic level.

Energy cannot be lost as

• uneaten parts

• faeces

• urea

• carbon dioxide

Which process results in the release of carbon dioxide from fossil fuel?

• combustion

• oxidation

• neutralisation

• respiration

Plants do not carry out respiration. Only animals do.

• True

• False

Which food chain passes on the largest proportion of energy from the sun to the final consumers of the food chain.

• food chain with 2 trophic levels

• food chain with 3 trophic level

• food chain with 4 trophic levels

• food chain with 5 trophic levels

During winter time, the amount of carbon dioxide in the atmosphere increases because

• human respires more in winter

• plants photosynthesize less in winter

• plants respire more in winter

Which process does not lead to the increase in production of greenhouse gases?

• deforestation

• industrialization

• reforestation

• urbanization

Oceans and forests are known as carbon _____ as they absorb more carbon that they release.