Mar 4 Angiosperms Review

Mar 4 Angiosperms Review - 4. A flower is derived from the...

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Biol 1401Angiosperms Review  Ch. 23 March 4 th , 2011 1. What is double fertilization?  Event in angiosperms in which one sperm  fertilizes the egg to produce a zygote and the other sperm fertilizes  the central cell to produce endosperm tissue  Which group of plants  has double fertilization?  fruits 2. What is the function of endosperm tissue?  It supplies a superior form of  nutrition for developing embryos  What is the main food-storing tissue of  dicot seeds?  The food source is the haploid megagametophyte 3. What are three important aspects of flower evolution? 1) pore germination within sporangia rather than spore release, as in  non-seed plants 2) avascular sexual stage, the gametophyte, within the tissues of the  vascular sporophyte 3) sexual reproduction through pollination 
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Unformatted text preview: 4. A flower is derived from the modified angiosperm . 5. In what structure are the male and female sporangia of angiosperms found? Flowers 6. A lot of separate flower parts, radial symmetry and superior ovary are characteristics of the more advanced angiosperms; Reduced and fused flower parts, bilateral symmetry and inferior ovary are characteristics of the more advanced angiosperms. 7. What is the advantage of having fused flower parts? The ovary may contain one to many ovules, and these may be arranged in various ways 8. Give two examples of both more ancestral and more advanced angiosperms. Ancestral-1) Ginko 2) Conifers Advanced-1) Stapelias 2) Carrion flowers...
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This note was uploaded on 03/23/2011 for the course BIOL 1401 taught by Professor Holaday during the Spring '08 term at Texas Tech.

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Mar 4 Angiosperms Review - 4. A flower is derived from the...

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