giai thich hien tuong:rau muong che nho ngam vao nuoc bi cong lai
rau muống  cong lại vì khi ngâm nước thì môi trường trong tế bào rau là ưu trương so với môi trường nước ( nồng độ chất tan trong tế bào rau cao hơn ) => nước từ môi trường đi vào tế bào => tế bào trương nước mà thành tế bào phía trong mỏng hơn phía ngoài => phía trong hút nước mạnh hơn => rau bị cong ra ngoài
ok pan nha –  thxuanphu2014 16-12-14 09:45 PM

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