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BIOLOGY

JAMB 2011 - Question 23

Biology 2011 JAMB Past Questions - Question 23: The movement response of a cockroach away from a light source can be described as

Choose the most appropriate option for the gap .

The movement response of a cockroach away from a light source can be described as

A: negative phototropism

B: positive phototropism

C: positive phototaxism

D: negative phototaxism

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Correct Answer

Explanation

Taxis or tactic movement is the directionalmovement of an entire organism e.g. cockroach 'in response to a stimulus suchas light.Negative phototaxism is therefore the movement ofthe entire organism (cockroach) away from light while positive phototaxism ismovement of the whole organism towards light.Tropism is a growth movement made by part of astationary piant in response to stimulus that comes from one direction.