NEET BIOLOGY

Detailed explanation-1: -Extinction occurs when species are diminished because of environmental forces such as habitat fragmentation, climate change, natural disaster, overexploitation by humans, and pollution, or because of evolutionary changes in their members (genetic inbreeding, poor reproduction, decline in population numbers).

Detailed explanation-2: -The background extinction rate is often measured for a specific classification and over a particular period of time. For example, a high estimate is that 1 species of bird would be expected to go extinct every 400 years.

Detailed explanation-3: -[ băk′ground′ ] The ongoing extinction of individual species due to environmental or ecological factors such as climate change, disease, loss of habitat, or competitive disadvantage in relation to other species.

Detailed explanation-4: -Factors involved in background extinction Primary processes that appear to be involved in background extinction are climate change and habitat infiltration by invasive species.

Detailed explanation-5: -The background extinction rate (the continual rate of species loss as they succumb to naturally occurring environmental and ecological forces) is quite low, amounting to roughly one to five species per year when the entire fossil record is considered.