Question

What could have triggered mass extinctions of species in the past

Answer 1

• Hi here is your answer....................................................
• An extinction event (also known as a mass extinction or biotic crisis) is a widespread and rapid decrease in the biodiversity on Earth.
• Such an event is identified by a sharp change in the diversity and abundance of multicellular organisms.
• It occurs when the rate of extinction increases with respect to the rate of speciation. Because most diversity and biomass on Earth is microbial, and thus difficult to measure,
• recorded extinction events affect the easily observed, biologically complex component of the biosphere
• rather than the total diversity and abundance of life.Hola here is your answer................................................................

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• #keep calm and ready for exam..........................  

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