Extinction Blank______.Multiple choice question.is when a species disappears on a local scale but not on a global scaleis a human-made eventdoes occur naturally

Which choices are included in the definition of "mass extinction"? A. The event must be global B. All ecologies must be involved C. The duration of the event must be short D. The number of species extinction must exceed 30% existing at the time

_____________ occurs when a large number of species goes extinct over a relatively short period of time.a.Extinctionb.Extirpationc.Mass Effectd.Mass Extinction

Describe a recent extinction event.

What process is most responsible for the extinction of most species of plants and animals that have lived on Earth? A. gene mutation B. environmental changes C. selective breeding D. decrease in reproduction

Biologists calculate that species extinctions are currently __________ times the rate seen previously in Earth’s history when there were no unusual geological or climatic events occurring.Question 18Select one:a.5-10b.50-100c.500-1000d.5000-10,000