Threatened species and the Sixth Extinctionसंकटग्रस्त जातियाँ और छठा विलोपन

NCERT Section 13.1.4 · Class 12 Biology · Chapter 13 · interactive diagram

Parts and their functions

• Birds: 12% threatened (पक्षी: 12% संकट में) — 12 per cent of all bird species face the threat of extinction.
• Mammals: 23% threatened (स्तनधारी: 23% संकट में) — 23 per cent of all mammal species.
• Gymnosperms: 31% threatened (अनावृतबीजी: 31% संकट में) — 31 per cent of all gymnosperm species.
• Amphibians: 32% threatened (उभयचर: 32% संकट में) — 32 per cent of all amphibian species — amphibians appear more vulnerable to extinction.
• The Sixth Extinction (छठा विलोपन) — Five mass extinctions happened before humans. The present (sixth) one differs in RATE: 100–1,000 times faster than in pre-human times, and human activities are responsible. Nearly half of all species might be wiped out within the next 100 years if trends continue.

Original diagram drawn by Simple Learning Hub, based on NCERT Section 13.1.4. Report a mistake