Bio 1109—Chapter 17

Bio 1109—Chapter 17 - Bio 1109-Chapter 17...

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Bio 1109—Chapter 17 03:37 Finish Chapter 17, Finish Chapter 18.17 for Tuesday Exam Lectures = guide for what is important Study review = very important  Some Evolutionary Surprises… 17.1—Plants evolved from green algae     Algal ancestors of plants may have carpeted moist fringes of lakes or coastal  salt marshes over 500 million years ago Chrarophyceans— lineage of green algae o Plants and modern day charophyceans probably evolved from a common  ancestor 17.2—Plants have adaptations for life on land     A typical plant must obtain chemicals from both soil and air— o A set of characteristics distinguishes land plants as a clade—sets them  apart from algae Growth-producing reigions called apical meristems, alternation of  haploid and diploid generations, walled spores produced in sporangia,  male and female gametangia and multicellular, dependent embryo\ Alternation of generation in plants…
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See chart Two generations: haploid (n) and diploid (2n) Sporophyte (2n), through meiosis divides into spores (n), creating  gametophytes through mitosis Through mitosis again, gametophytes create gametes (n), male and female
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This note was uploaded on 09/22/2009 for the course BIO G 109 taught by Professor Winkler,d. during the Fall '06 term at Cornell.

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Bio 1109—Chapter 17 - Bio 1109-Chapter 17...

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