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When a particular species ceases to exist, that species has gone extinct. An extinct species has no living family members.
The word that means a species of animals or plants is not longer in existence is extinct. Animals that are no longer plentiful, might be called endangered.
it is extinct
In mutualism, one needs to interact with the other. The existence of one species makes the other species thrive. For example, bees need plants and flowers to get nectar.
these are the plants and animals whose continued existence in treatened
Planet earth doesn't "need" anything, nor does life on the planet. Some bacteria can exist by chemicals. HOwever for our existence and through others species existence plants takes away CO2 in the atmosphere and also replenishes it with oxygen. We need oxygen to breath. All animals need oxygen.
Crows have been proven to be the most intelligent species of bird in existence as of 2011.
As long as cows have been in existence, or the whole Bos primigenius species and subspecies have been in existence.
platypus
lycophytes
Extinction.
there are 5000 species of plants and about 4000 are flowering plants.