Station 17 Germinating Pollen – Study the slide of pollen germinating. Be able to identify the following structures: the pollen grain and pollen tube. What are the nuclei that may be seen in a pollen tube? Station 18 Female Gametophyte with the 4-nucleate Embryo Sac – Study the slide of the 4-nucleate embryo sac. On the slide, there are 6 cross sections of the Fritillaria ovary. Locate an embryo sac showing the 4-nucleate stage. Be able to identify the following structures: ovary, ovary wall, ovule, embryo sac, and the 4 megaspores (nuclei). Station 19 Female Gametophyte with the 8-nucleate Embryo Sac – the flower model. Locate the embryo sac showing the 8-nucleate stage. Be able to identify the following structures: ovary, ovary wall, embryo sac, antipodals, polar nuclei, synergids, egg, integument, and micropyle. What happens to the antipodals fertilization? What happens to the polar nuclei after fertilization? What happens to the synergids fertilization? Why is fertilization in flowering plants called double fertilization? Station 20 Seeds – Be able to recognize the structures on a monocot (corn) and a dicot (Bean) seed diagram Station 21 Fruit and Seed Dispersal –
Station 17 – Germinating Pollen Study the slide of pollen germinating. Be able to identify the following structures: the pollen grain and pollen tube. What are the nuclei that may be seen in a pollen tube? Station 18 – Female Gametophyte with the 4-nucleate Embryo Sac Study the slide of the Fritillaria 4-nucleate embryo sac. On the slide, there are 6 cross sections of the ovary. Locate an embryo sac showing the 4-nucleate stage. Be able to identify the following structures: ovary, ovary wall, ovule, embryo sac, and the 4 megaspores (nuclei). Station 19 – Female Gametophyte with the 8-nucleate Embryo Sac the flower model. Locate the embryo sac showing the 8-nucleate stage. Be able to identify the following structures: ovary, ovary wall, embryo sac, antipodals, polar nuclei, synergids, egg, integument, and micropyle. What happens to the antipodals fertilization? What happens to the polar nuclei after fertilization? What happens to the synergids fertilization? Why is fertilization in flowering plants called double fertilization? Station 20 – Seeds Be able to recognize the structures on a monocot (corn) and a dicot (Bean) seed diagram Station 21 – Fruit and Seed Dispersal
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