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    Biology; Chemistry; Physics: Post your doubts here!

    Can someone answer me this question. i always get confused in it. Q- Why the amoeba living in fresh water have contractile vacuole, whereas the amoeba living in sea water do not have any contractile vacuole?
  2. S

    ISLAMIAT HELP Needed !!!!!!!

    can anybody help me in writing a note for any personality. plzzz
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