Extinction is a natural phenomenon. It is estimated that 99% of all species that everlived are now extinct. Why then do we say that we are now experiencing anextinction (loss of biodiversity) crisis?O Humans have greater medical needs than at any other time in history, and manypotential medicinal compounds are being lost as plant species become extinct.Scientists have finally identified most of the species on Earth and are thus ableto quantify the number of species becoming extinct.Most biodiversity hot spots have been destroyed by recent ecological disasters.The current rate of extinction is high and human activities threaten biodiversityat all levels.Humans are ethically responsible for protecting endangered species.

Extinction is a natural phenomenon. It is es 99% cles that ever lived are now extinct. Why then do we say that we are now experiencing an extinction (loss of biodiversity) crisis? Humans have greater medical needs than at any other time in history, and many potential medicinal compounds are being lost as plant species become extinct. OScientists have finally identified most of the species on Earth and are thus able to quantify the number of species becoming extinct. Most biodiversity hot spots have been destroyed by recent ecological disasters. The current rate of extinction is high and human activities threaten biodiversity at all levels.

Extinction is a natural phenomenon. It is es 99% cles that ever lived are now extinct. Why then do we say that we are now experiencing an extinction (loss of biodiversity) crisis? Humans have greater medical needs than at any other time in history, and many potential medicinal compounds are being lost as plant species become extinct. OScientists have finally identified most of the species on Earth and are thus able to quantify the number of species becoming extinct. Most biodiversity hot spots have been destroyed by recent ecological disasters. The current rate of extinction is high and human activities threaten biodiversity at all levels.

Biology Today and Tomorrow without Physiology (MindTap Course List)

5th Edition

ISBN:9781305117396

Author:Cecie Starr, Christine Evers, Lisa Starr

Publisher:Cecie Starr, Christine Evers, Lisa Starr

Chapter17: Communities And Ecosystems

Section: Chapter Questions

Problem 1CT

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