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Listing 1 - 4 from 4 for egg cell

The Ferns
... arborea) There are climbing ferns, aquatic ferns, tree ferns, filmy ferns with leaves just one cell thick, epiphytic ferns and, of course, ferns of a more conventional herbaceous habit. Floating ... an egg cell, form on the underside of the heart-shaped gametophyte. The multiflagellate antherozoids (sperm) swim in surface water to the archegonia, attracted by a chemical secreted by the egg. The egg is ...
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The Pines
... the pollen in being blown by the wind to a female cone. prothallial cell generative cell tube cell air bladder Biodisc photomicrograph Female reproductive organs Biodisc photomicrograph The female cone (megastrobilus) ... archegonia, each with an egg cell. In the pollen tube, 2 non-motile sperm cells develop from one of the cells formed from the generative cell. Pinus female gametophyte developing by ...
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Introduction to the Flowering Plants
... test whether the Shroud of Turin really came from Israel. . . Production of megaspores and embryosac . . Egg cell surrounded by 2 synergid cells 2 polar nuclei 3 antipodal cells . functional megaspore embryosac (other ... tube apparently homes in on the egg cell based on chemical signals from the synergid cells. The 2 male nuclei are released, one fusing with the egg to form the zygote and embryo ...
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Cycads
... and is drawn into the pollen chamber as the water evaporates. tube generative prothallial cell cell cell The pollen grain is made up of three cells (left). Cycads, unlike other seed ... through and parasitizes the megasporangium. The generative cell ultimately forms multiflagellate sperm cells. These swim down the tube, enter the archegonium and one fertilizes the egg. An embryo develops from this ...
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