BIO203H5 Lecture Notes - Lecture 9: Haustorium, Monocotyledon, Autotroph
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Ferns: some of the oldest vascular plants. Minimal shading above leaves due to special arrangements (??) Shoot system produces food on its own and fixes carbon. Autotrophic: can produce food entirely on their own, like plants can. Heterotrophic: has to eat other thi(cid:374)gs (cid:271)e(cid:272)ause its (cid:271)ody (cid:272)a(cid:374)"t produ(cid:272)e a(cid:374)y or enough food from light. Heterotrophic plants evolved around 20 times independently seed plants. Heterotrophe: an organism that grows, feeds, or is sheltered on or in a different organism while contributing nothing to the host. (heterotrophes are heterotrophic) Excludes mutualist relationships like those between mycorrhizae and plants, or plant and bacteria. Excludes epiphytes: orga(cid:374)is(cid:373)s that gro(cid:449) o(cid:374) other orga(cid:374)is(cid:373)s (cid:271)ut do(cid:374)"t dire(cid:272)tly depe(cid:374)d o(cid:374) the(cid:373) for nutrients (cid:894)like (cid:448)i(cid:374)es that gro(cid:449) o(cid:374) trees to get to the su(cid:374), (cid:271)ut are(cid:374)"t parasiti(cid:272) or (cid:449)hate(cid:448)er(cid:895) Noxious epiphytes crowd out other plants and kill them, or are poisonous, like poison ivy or kudzu vines.
