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- Voherige Episode S01E80 - World War II: Crash Course World History #38
- Episode S01E81
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Letzte Aktualisierung
24 juillet 2023 - 14:12
auf 11 Datenbanken -
The Plants & The Bees: Plant Reproduction - CrashCourse Biology #38
Hank gets into the dirty details about vascular plant reproduction: they use the basic alternation of generations developed by nonvascular plants 470 million years ago, but they've tricked it out so that it works a whole lot different compared to the way it did back in the Ordovician swamps where it got its start. Here's how the vascular plants (ferns, gymnosperms, and angiosperms) do it.
Table of Contents
1) Sporophyte Dominance 01:55
2) Ferns 02:14
3) Gymnosperms 03:35
4) Angiosperms 05:33
5) Truth or Fail: Fruit Edition! 08:28
References:
http://www.home.aone.net.au/~byzantium/ferns/about.html
http://hcs.osu.edu/hcs300/gymno.htm
http://www.msnucleus.org/membership/html/k-6/lc/plants/5/lcp5_5a.html
http://faculty.unlv.edu/landau/gymnosperms.htm
http://www.youtube.com/watch?v=AykzPemLs7Q&feature=relmfu
http://extension.oregonstate.edu/mg/botany/flower2.html
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