BIO 204 final review sheet

BIO 204 final review sheet - L ab 2 Angiosperms: Figures...

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Lab 2 Angiosperms: Figures 29.9, 29.10, 29.12. Correction: 29.5 refers to Gymnosperms Plant Anatomy and Reproduction: Figures 34.1, 34.2, 34.4, 34.6, 34.11, 34.12, 34.17, 34.23 and 35.9. Carnivorous and parasitic plants: Figures 36.11 and 36.12 Plant stresses: Section 39.3 Biomes: Section 52.3, pages 1116-1128 and Section 52.5, pages 1135-1136 29.1 How did seed plants become today's dominant vegetation? Only seed plants show  secondary growth , producing wood. The surviving groups of seed plants are the  gymnosperms  and  angiosperms All seed plants are  heterosporous,  and their gametophytes are much smaller than, and  dependent on, their sporophytes.  Review Figure  29.3 An  ovule  consists of the seed plant megagametophyte and the  integument  which  protects it. The ovule develops into a seed. Pollen grains , the microgametophytes, do not require liquid water to perform their  functions. Following  pollination , a  pollen tube  emerges from the pollen grain and  elongates to deliver gametes to the megagametophyte. Pollen grains are enclosed in  highly resistant sporopollenin walls. Seeds are well protected, and they are often capable of long periods of dormancy,  germinating when conditions are favorable. 29.2 What are the major groups of gymnosperms? The extant gymnosperms may be a clade, as are at least three of the four gymnosperm  groups.  Review Figures  29.2  and  29.6 The gymnosperm clades are the  cycads ginkgos , and  gnetophytes Conifers  are the  most abundant gymnosperms. The megaspores of pines are produced in  cones , and microspores are produced in  strobili . Pollen reaches the megasporangium by way of the  micropyle , an opening in the  integument of the ovule.  Review Figures  29.7  and  29.8
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BIO 204 final review sheet - L ab 2 Angiosperms: Figures...

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