give or take
i know a lot, but for a closer number
what would be a safe number to guess?
2007-05-14 18:25:58 · 4 answers · asked by Anonymous in Science & Mathematics ➔ Zoology
It was my understanding it was roughly 2 million, with about a million that are arthropds, or rather insects and arachnids and so on, alone. With approximately 10 million estimated to exist (they speculate they have only identified a portion of the total based on the rate of all the new species they identify every year).
According to MSN Encarta, quote:
"Animal, multicellular organism that obtains energy by eating food. With over 2 million known species, and many more awaiting identification, animals are the most diverse forms of life on earth. They range in size from 30-m (100-ft) long whales to microscopic organisms only 0.05 mm (0.002 in) long. "
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2007-05-14 20:54:48 · answer #1 · answered by Professor Armitage 7 · 0⤊ 0⤋
An estimated tens of millions have existed, and only a small fraction have ever observed in detail.
2007-05-15 01:30:39 · answer #2 · answered by Mickey Mouse Spears 7 · 0⤊ 0⤋
It's impossible to tell. There are new ones being discovered every day, and others dying out.
2007-05-15 01:29:00 · answer #3 · answered by Jenni 4 · 0⤊ 0⤋
like a million
2007-05-15 04:24:17 · answer #4 · answered by brattieangel_ac 2 · 0⤊ 0⤋