Question 30
Ecosystem and Ecological FactorsThe diagram below is an illustration of organisms in an air-tight aquarium. The most important factor needed by the organisms is
- A.light energy.
- B.low humidity.
- C.oxygen.
- D.nitrate.
Show the answer and explanation
Answer: A (light energy.)
Explanation
The aquarium is sealed, so nothing comes in from outside except light. With light, the water plants photosynthesise and produce the oxygen and food that the fish, snail and insects need.