Question

One of the following is a true micro-ecosystem?

• A. One litre of pond water closed with a cork having gas exchange tube
• B. One litre of water from a pond kept in an air tight flask
• C. Ten litre of boiled pond water covered over by a lid
• D. One litre of tap water in a flask covered over by cotton plug

Answer 1

The correct option is A One litre of pond water closed with a cork having gas exchange tube

Micro-ecosystems can exist in locations which are precisely defined by critical environmental factors within small or tiny spaces. Such factors may include temperature, pH, chemical environment, nutrient supply, presence of symbionts or solid substrates, gaseous atmosphere (aerobic or anaerobic) etc.

One litre of pond water closed with a cork having gas exchange tube can be a micro-ecosystem as it fulfill all the requisites of definition.

So, the correct answer is "option D"