VascularPlants10-24

VascularPlants10-24 - Vascular Plants 1 1. Limitations in...

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Vascular Plants 1 1. Limitations in non-vascular plants No water or nutrient transport limits their size; they’re small – diffusion = limited No roots = hard to obtain enough water to be big No support/rigid tissue another reason why they have to stay small II. Synapopmorphies of vascular plants 1) Development of vasculature tissue support allowing them to grow taller Vasculature tissue also allow water and nutrients to be transported Synapomorphy = key dervied trait that helps you define a monophyletic group or clade – something you see in all members of this group 2) Sporophyte Dominance – large sporophyte + reduced gametophyte. Benefits = more spore production helps a lot when mating is hard Sporophyte branching increased spore production increase ability of plant to increase for life Both of these features allow better competition for life III. Sporophyte Dominance Gametophyte makes gametes sperm swims over to fertilize egg egg divides into
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This note was uploaded on 03/15/2010 for the course BIS 1C 22222 taught by Professor Dehesh during the Spring '08 term at UC Davis.

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VascularPlants10-24 - Vascular Plants 1 1. Limitations in...

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