1HEGan animal or plant that lived many thousands of years ago and that has been preserved, or the shape of one of these animals or plants that has been preserved in rock 化石
fossils of early reptiles
早期爬行动物的化石
Marine sponges have a long fossil record (=their development has been recorded over a long period).
fossil record• Most are microscopic, and many have no skeleton and therefore lack a fossil record.• We know about them from fossil records.• In the 1850s the fossil record began to yieldevidence for a new kind of trend within the development of each class.• Nevertheless this is not to deny that there are some very curiousfeatures about the fossil record.• For heaven's sake, Rachel, look at the fossil record as a whole.• But the fossil record of the insects is far from perfect - very sporadic and selective.• The greatest problems in the fossil record, however, are the suddenextinctions.• The fossil record shows that species do not evolve, .
Originfossil
(1500-1600)Latinfossilis“dug up”, from fodere“to dig”