1. The extent of complexity and density of ________ can be regarded as a measure of health of an ecosystem.
Fill in the blanks:
1. The extent of complexity and density of ________ can be regarded as a measure of health of an ecosystem.
2. In a museum, plant and animal specimens are preserved in _________ in transparent jars.
3. A naturalist can study food habits and behaviour of animals in a ___________.
4. Study of _________ is a must, to understand interrelations between organisms and maintain harmony on planet earth.
5. The statement in a key is called a _________.
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