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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REVOLUTIONS-INDUSTRIAL AND INFORMATION

INDUSTRIAL REVOLUTION Starts in Europe particularly in England in eighteen century.It changed the whole of Europe and England 's economy.During this period New machines are invented in England to speed up the spinning of wool and cotton .At first they were powered by water wheels but later steam engines are developed.Iron become cheaper and stronger as Iron making techniques improved.Canals are dug to carry coal from the mines and to transport finished goods.After some times Railways replaced canals .The first railways opens in 1825.Big changes took place in Agriculture .Machines replaced human power,thus now fewer people are to grow food.This forced people to leave the country side to find work in mills and factories.Industrial town grow rapidly. MASS PRODUCTION - The most unique thing of Industrialization was mass produ

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