It is impossible to quantify an unknown factor.
No, not all organisms on Earth have been classified. There are many undiscovered species, particularly in unexplored regions like the deep sea or remote rainforests. New species are continuously being identified and classified by scientists.
2
i do not know
their are about 100
4,500
Scientists have identified and named around 1.7 million species of organisms, but it is estimated that there may be anywhere from 8.7 million to over 1 trillion total species on Earth.
( 1,250,000 ) have been identified
There are 33 known species of seals out there that have been identified.
40 thousand spiecices of organisms have been identified and there are plenty more that are still unidentifed.
250,000
250,000 Different Species
Over 1.5 million species have been identified and described by scientists, but it is estimated that there could be anywhere from 5 million to over 100 million total species on Earth, with many still waiting to be discovered and classified. Each year, new species are being discovered in various ecosystems around the world.