BIOL 1001 Lecture Notes - Lecture 6: Beringia, Marsupial, Supercontinent
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Dar(cid:449)i(cid:374) o(cid:271)ser(cid:448)ed e(cid:448)ide(cid:374)(cid:272)e of hutto(cid:374) a(cid:374)d l(cid:455)ell"s (cid:272)lai(cid:373) a(cid:271)out the e(cid:454)tre(cid:373)e age of earth. Biol (cid:1005)(cid:1004)(cid:1004)(cid:1005) lecture #6 was correct at andes mountains. He found resembling species at pampas grasslands. The abundance of marsupials in australia is a result of them being originated there/geographical isolation of australia. Ma(cid:373)(cid:373)als at australia are a (cid:862)(cid:373)arsupial(cid:863) (cid:448)ersio(cid:374) of pla(cid:272)e(cid:374)tal (cid:373)a(cid:373)(cid:373)als. The reaso(cid:374) (cid:373)arsupials (cid:449)ere i(cid:374) australia (cid:449)as to (cid:862)start(cid:863) the (cid:272)reation of other mammals in. Convergent evolution: species with similar adaptations, habitats etc but from different regions. Continental plates are moving; theory of plate tectonics. 220 million years ago, there was a huge supercontinent called pangea. Egg laying mammals moved and spread throughout all the small continents we know now (at that time they were all one supercontinent. Marsupials spread o(cid:448)er the beri(cid:374)g la(cid:374)d (cid:271)ridge i(cid:374)to a(cid:373)eri(cid:272)a"s a(cid:374)d other (cid:272)o(cid:374)ti(cid:374)e(cid:374)ts when they were all connected/relatively close to each other.
