Multiple choice

Keystone species deserve protection because these

  1. are capable of surviving in harsh environmental conditions

  2. indicate the presence of certain minerals in the soil

  3. have become rare due to over exploitation

  4. play an important role in supporting other species
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

A keystone species is a species whose very presence contributes to a diversity of life and whose extinction would consequently lead to the extinction of other forms of life. Keystone species help to support the ecosystem (entire community of life) of which they are a part. 

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