LIFE SCIENCE

Detailed explanation-1: -A species is said to be extinct when it no longer lives anywhere on the planet. Extinction occurs when the last members of a species die because they cannot acquire the food, water, shelter, and/or space necessary to survive.

Detailed explanation-2: -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-3: -Global extinction refers to the loss of species or other taxonomic units (e.g., subspecies, genus, family, etc.; each is known as a taxon) occurring when there are no surviving individuals elsewhere. The extinction of any species is an irreversible loss of part of the biological richness of the Earth.

Detailed explanation-4: -Extinct species, explained One thing we do know: The western black rhinoceros, the Tasmanian tiger, and the woolly mammoth are among the creatures whose populations at one point dwindled to zero, and it’s possible that species extinction is happening a thousand times more quickly because of humans.

Detailed explanation-5: -The three types of extinction are mass extinction, background extinction, and human-led extinction. Mass extinctions occur quickly and wipe out large amounts of species at a time.