Bio oct19

Bio oct19 - Structure/Function Relationships Plant...

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Structure/Function Relationships o Life most probably arose in an environment where water was plentiful o A lot of the structures we see now relate to features that were needed when plants and animals moved from an aquatic environment to a terrestrial environment. o In an aquatic environment plants/animals would have been surrounded by water – no issues with obtaining water, obtaining nutrients from the water, no issues with support or movement. o WATER!!! o Water uptake – roots developed o Water movement – vascular system o Support – Beta glucose (primary cell walls (cellulose) secondary cell wall (thick wall support cells)) central vacuole o Drying out – plants have a cuticle that covers all exposed surfaces to prevent water from escaping but also prevents water from getting in – stomata o Gamete transfer – not involving water needed to develop (flower – pollination) protecting the embryo – seed Aquatic Terrestrial - Non vascular mosses, liverworts
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This note was uploaded on 04/22/2008 for the course BIO 1305 taught by Professor Eldridge during the Fall '08 term at Baylor.

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Bio oct19 - Structure/Function Relationships Plant...

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