living fossils -1limulus king
LIVING FOSSILS -
1.
Limulus (King crab)
Arthropoda
2.
Neopelina
Mollusca
3.
Nautilus
4.
Plastasterias
Echinodermata
5.
Lamprey
Cyclostomata
6.
Latimaria
Fish
7.
Sphenodon (tuatara)
Reptilia
8.
Echidna
Mammalia
9.
Platypus
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types of fossils -snofossilexamplemode of formation1unalteredpreservationwooly mammoths 25000 yearsold ice in siberia mummies insectwhole bodies
palynofossils microfossils -fossils of planktons diatoms unicellular algae diatoms and shelled protozoans heliozoans radiolarian and foraminifera
mass extinction -since beginning many species evolved and got extinct in fact only 1 is livingsometimes it occured suddenly at large scale most
determination of the age of fossil -radioactive clock boltwood-1907 - half life of uranium is 45 billion yearsthis means half of total uranium
living fossils -1limulus king living fossils -1limulus king
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