Respuesta :
An extinction event (also known as a mass extinction or biotic crisis) is a widespread and rapid decrease in the biodiversity on Earth. There is a sharp change in the diversity and abundance of multicellular organisms. I
Paleontologists have found evidence that after a major extinction occurs,many new species often appear at about the same time .
Paleontologists have found evidence that after a major extinction occurs,many new species often appear at about the same time .