PLANT VARIETY-ALGAE AND SEA WEEDS

ALGAE ARE   NOT TRUE PLANTS.They   form a   diverse   group of   plant - like   organisms that belong to the kingdom protista .Like plants ,   algae possess   the green pigment   chlorophyll    and make their own food   by    photosynthesis . Many algae    also possess   other pigments &n bsp; by which    they can be classified ,   for example , the brown pigment   fucoxanthin is   found in the brown   algae . Some   of the   ten phyla   of algae   are excessively   unicellular (single celled ), others also contain aggregate of cells   in filaments or colonies .
Three    phyla -the chlorophyta (green algae), rhodophyta (red algae), and phaeophyta(brown algae)- contain larger , multicellular , thalloid (flat).
Marine    organisms    commonly   known   as seaweeds.Most algae can reproduce   sexually . For example , in the brown seaweed gametes (sex cells) are produced in conceptacle(chambers) in the receptacles (fertile tips of fronds);after their release into the sea,antherozoids(male gametes) and oospheres    (female gametes) fuse; the resulting zygote settles on a rock    and develops into a new seaweed. algae .

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