The plant or animal is said to have become extinct.
extinct
There might a rare plant that lives in volcanoes and if a volcano erupts it might become extinct
I have a large chunk of sigillaria (first cousin of the Lepidodendron) from Arizona that my great-uncle obtained many, many decades ago. The other fossils were Triasic, I believe. But the Lepidodendron and Sigillaria were Carboniferous trees, which flourished when our atmosphere was 30% more dense than it is now. Could they have survived into the Triasic?
because it can
Unless it lives forever, a plant would become extinct if it doesn't reproduce.
no it is not extinct
There are no living examples left anymore.
500 species
When the last individual organism dies the animal or plant will become extinct.
It's called Endangered if a species is threatened to go extinct.
If something else eats a plant or animal that becomes extinct, it might become endangered. But it would most likely just find something else to eat.