KEY TO CHARACTERS ChJoropthyta 2. Cellulose in cell wdla 3. Starch produced by p
ID: 260362 • Letter: K
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KEY TO CHARACTERS ChJoropthyta 2. Cellulose in cell wdla 3. Starch produced by photooytheas 4. Unique leaves and roots 5. Three-lobed sporanga 6. Ribbed tons 7. Rediced whodledlesves &. Circinate vemation "fiddeheadd" 9. SEEDSI 10. Reduced, peedle-like leaves 11. Fan aped leeves 12 Round seeds 13. FLOWERSH 14 Double Ferslization Hornrorts 1,2,3 Mosses Lycophytes Prilophytes Oreen Alge (aquatie) Dominent Oam etophyte Dom inant Sporophyte Sphenophytes Ferns Conifers 12 13 14 According to the above plant phylogeny, which group is most closely related to angiosperms, or flowering plants? a.Conifers b. Ginkgos c.True Ferns d.Cycads Regarding the phylogeny below, what evolutionary innovation appeared among the land Examine the more detailed phylogeny and list what anatomical innovations flowering plants (angiosperms) have that the gymnosperms and spore plants of the Paleozoic didn't: What is meant by double-fertilization?Explanation / Answer
At 'A' the land plants diverged into plants with naked or unprotected seed (gymnosperm) and flowering plants (plants with protected seeds or angiosperms)
Angiosperms have sporophylls aggregated into flowers which often contains male and female reproductive part in one strucuture. The male reproductive part androecium or stamen consists of anther and filament and female part gynoecium or pistil consists of stigma, style and ovary. The ovule in these plants are covered in ovary. Pollen germinates on stigma and enters ovary through the style. The resulting seed is protected in a fruit.
Double fertilization is a process in angiosperms where one male gamete ( sperm cell of a pollen grain) ferlitlizes an egg cell to form a diploid zygote and a second male gamete fuses with 2 polar nuclei to from a triploid cell which develops into endosperm tissue.
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