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This 2 page Class Notes was uploaded by Nicholas Petrusevski on Monday October 5, 2015. The Class Notes belongs to Bio209WeekOneNotes at Northern Illinois University taught by a professor in Fall 2015. Since its upload, it has received 140 views. For similar materials see Funds of Organismal Biology in Liberal Arts at Northern Illinois University.
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Date Created: 10/05/15
Monday October 5 2015 BIOS 209 Week 6 Notes Plants Continued 1 Characteristics seed plants have microscopic gametophytes I pollen develops from a spore II Pollen and seeds can survive well on land III Pollen grains do not need water to disperse they are move by wind or animals IV Seeds protect the embryo and contain food for the growing embryo V Angiosperms VI include Dine trees VII in temperate regions many gymnosperms are evergreen VIII Angiosperms are also called owering plants IX they can be characterized by owers and fruit X ower is a structure for sexual reproduction made of modi ed leaves XI structure that obtain a seed and often helps in dispersal XII Remember that Anther contains pollen Monday October 5 2015 XIII Ovule contains egg cell XIV ovary develops into fruit they are not eshy like tomatoes and peaches fruit can also be dry like nuts XV endosperm provides food to developing embryo and seed XVI there are two big groups of Angiosperms Monocots 14 and Dicots 34 XVII wind pollinated huge numbers of small light pollen XVIII odds are some will land on same sp XIX e g gymnosperms XX animal pollinated XXI ower traits that can increase tness odor color reward attract pollinators XXII more pollinators more seeds more offspring XXIII Seed Dispestal often in fruits XXIV fruit provides a reward for animal seed dispersers that defecate seeds and fertilizer XXV animals that feed on plants herbivores can reduce fitness XXVI This causes strong natural selection for plants than can minimize feeding by herbivores XXVII secondary compounds are plant chemicals that do not play a role in primary metabolism but often DISCOURAGE HERBIVORY XXVIII