Question

________ act as indicator of a potent danger to human life by providing advance warning of danger in the environment.. Single choice.

Keystone Species

Threatened species

Sentinel species

Vulnerable species


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Answer 1

Question:-________ act as indicator of a potent danger to human life by providing advance warning of danger in the environment.. Single choice.

Keystone Species

Threatened species

Sentinel species

Vulnerable species

Answer:-Vulnerabe Spices

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Answer 2

(a)Sentinel species act as indicators of a potential danger to human life by providing advance warning of danger in the environment.

• Sentinel species warn humans of potential danger by accumulating certain pollutants in their tissues. These pollutants are not fatal for these species and can be used in the study of the effect of certain pollutants on humans. The canaries are examples of these.

• Keystone Species play a pivotal role in the ecosystem. They often act as a connection between species. They may not be present in maximum numbers but their impact is huge. Lion is an example of keystone species.

• Threatened species are prone to extinction in the near future. If not protected, they might become extinct in a few years. Panda is an example of threatened species.

• Vulnerable species face a risk of extinction in the present scenario. To save these species, work has to be done actively. The Asiatic elephant is an example of these.