Life cycle of a pine tree animation
The Life Cycle of a Pine Tree by Linda Tagliaferro
Pine tree life cycle. Plant growin from seed to mature pine tree with cones.
Plants that have cones instead of flowers, also referred to as conifers. There are 9 videos in this category and 0 videos in 0 subcategories. Follow Us. X Login. Remember Me. Forgot Password?
Characteristics of the life cycle The female and male inflorescence of the pine tree develop as cones on the sporophyte. Inside the ovule the megasporocyte undergoes meiosis, producing four haploid cells. One of these cells survive as a megaspore. The megaspore goes through mitotic divisions and forms a small female gametophyte, in which two or three archegonia are present, each with one egg cell. De male cone is in fact composed of numerous strobili.
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The female and male inflorescence of the pine tree develop as cones on the sporophyte. The female cones (female strobili, singular strobilus).
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1,530 life cycle tree illustrations & vectors are available royalty-free.
Stage 1: Male cones pollen cones and female cones ovuliferous cones are formed on the adult tree or the spore-bearing plant sporophyte. Stage 3: A longitudinal section of a male cone shows that it is made up of many fertile scales spirally arranged around a central stalk. Stage 4: A longitudinal section through one fertile scale will reveal the contents of a pollen sac there are two pollen sacs side by side on a fertile scale. Special cells called sporocytes inside the pollen sac undergo reduction division meiosis to form many small spores or microspores Four microspores are formed from each sporocyte. Stage 5: The single-celled microspores still inside the pollen sac begin developing into pollen grains while still attached to their fellow microspores. A thick wall forms around each developing pollen grain, and two zones of the wall bulge out and become hollow air-filled sacs. Stage 6: As they develop the microspores separate.
Pine tree life cycle. Plant growin from seed to mature pine tree with cones. Royalty-Free Vector. Download preview. Plant growin from seed to mature pine tree with cones isolated on white background.