BIO203H5 Lecture Notes - Lecture 9: Haustorium, Chloroplast, Vestigiality
Document Summary
Petioles allow leaves to exchange water throughout plant. Autotrophic able to synthesize the nutritive substances it requires from inorganic substances in its environment. Heterotrophic only partially able or completely unable to synthesize the nutritive substances it requires from inorganic substances in its environment (ex. humans) Epiphytes grow upon other organisms but do not depend on them directly for nutrients. Usually do for support to reach light. Noxious epiphytes (are not heterotrophic), ex. kudzu. There is no single origin of heterotrophy, parasites, and mycotrophs (they evolved independently many times) Are mycotrophic plants parasites? (i think no bc they feed on fungus which do not directly produce food themselves) Haustoria can attach to the stem of parasites too (branch parasites) Hemiparasites are not completely dependent on host, can vine, ivy fungi) photosynthesize a bit. Hemiparasites = obligate or facultative (they are opportunistic) Flowers of holoparasites are very unusual (they often look like.
