O-LevelBiologyEcology & Environment5090/11 · May/June 2015 · Q61 Mark

Some organisms live at the bottom of the seas where it is very dark. To synthesise glucose, they use energy from chemicals in the very hot water that comes out of volcanoes. What is a distinguishing feature of these organisms?

ATheir enzymes are easily denatured by heat.

BThey do not need carbon dioxide.

CThey do not need to be green.

DThey obtain energy only as carnivores.

✓ Correct answer

C: They do not need to be green.

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Topic: Ecology & Environment, O-Level Biology (syllabus 5090). Multiple choice, 1 mark.
Source: O-Level Biology, May/June 2015 Paper 1 Variant 1, question 6.

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