Lecture 20100921

Lecture 20100921 - 1 Lear ning to Lear n Save time by...

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Unformatted text preview: 1 Lear ning to Lear n Save time by studying smar t What: A 2-hour wor kshop on studying mor e efficiently Wher e: Chancellor Day H all (L aw) Room 200 When: Wednesday September 22 nd 5-7 pm H ow: Fir st come fir st ser ve (50 people limit) What to br ing: Clicker s ( if you have one), pen/pencil, I D 2 To better understand the material in this lecture, you should understand the terms below. Read up on them. Alternation of generations Gametophyte and sporophyte Haploid and diploid Gametes and gametangia, archegonium, antheridium Isogamy and heterogamy Homospory and heterospory 3 Evolution of Land Plants Biol-111 (2010) Lecture 6 Rajinder Dhindsa 4 Transition from water to land poses challenges to organisms Structural challenges Physiological challenges 5 Living in water, what do organisms get from their surroundings? Make a list of necessities of life and how a plant living in water fulfills them. Then think about what challenges a plant on land would face in fulfilling the same necessities. To begin with, focus on structural changes plants might have to evolve for living on land. 6 7 8 Alternation of Generations In sexually reproducing organisms, there is a phenomenon called Alternation of generations. A haploid form called gametophyte with one set of chromosomes alternates with a diploid form called sporophyte with two sets of chromosomes. Gametophyte produces gametes that fuse to form zygote that develops into sporophyte. The latter forms haploid spores through meiosis. Each spore develops into a gametophyte. 9 Advanced green algae are ancestors of plants All green algae have Photosynthesis with chlorophyll a,b Cellulose cell walls Haploid dominant Pair of advanced groups...
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This note was uploaded on 09/29/2010 for the course SCIENCE 110 taught by Professor Irene during the Spring '10 term at McGill.

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Lecture 20100921 - 1 Lear ning to Lear n Save time by...

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