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WAEC Biology 2014 Question 31

Question 31

Ecosystem and Ecological Factors

The diagram illustrates an ecological instrument.
The instrument is

Diagram for this question
  1. A.an anemometer.
  2. B.a hygrometer.
  3. C.a barometer.
  4. D.a wind vane.
Show the answer and explanation

Answer: D (a wind vane.)

Explanation

An arrow that turns on a pole above fixed N, S, E and W arms is a wind vane.