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New York State Required Labs – Review Diffusion Through A ...

New York State Required Labs Review Diffusion Through A Membrane Making Connections Beaks of Finches Relationships and BiodiversityDiffusion Through a MembraneDiffusion Through A Membraneindicator chemically indicates if a substance is present by changing coloriodine= starch indicator solutionBenedict s solution = glucose indicator solution must be heatedDiffusion Through A Membranediffusion movement of molecules from a region of high concentration to a region of low concentration no energy needed (passive transport) Diffusion Through A Membrane we used a dialysis tube to simulate a semi-permeable cell membrane the dialysis tube was filled with glucose solution and starch solution, sealedand rinsed with water it was placed in a beaker with water and iodine and allowed to sitDiffusion Through A Membraneresults ofstarch test inside and outside of cellDiffusion Through a Membraneresults of glucosetest outside of cellDiffusion Through a MembraneDiffusion Through A

Beaks of Finches This activity simulates concepts involved in natural selection: variation – different beak types and seed sizes competition – more than one bird feeding at a time struggle for survival – each bird trying to get enough to survive adaptation – particular characteristics of each beak environment – the birds, food and island

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