For a science project, a student is asked to explain the osmotic function of the cell membrane using a working model. Which model should the student consider?
O a solid rubber ball placed in a beaker containing a concentrated salt solution
an egg in its shell placed in a beaker containing a concentrated sugar solution
O a solid, impermeable plastic ball containing a sugar solution placed in a beaker containing a more concentrated salt solution
O a semi-permeable plastic bag filled with a sugar solution placed in a beaker containing a more concentrated sugar solution
Answers: 3
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In a classic experiment using pea shape, mendel conducted two separate genetic crosses. in the first cross the parent plants were “true breeding” for pea shape; one had round peas ( r )and the other had wrinkled (r). the first cross produced a filial 1 generation of all round peas. in the second cross, mendel bred plants from the filial 1 generation. this cross produced different results. out of approximately 1000 plants, about 75% were round and 25% were wrinkled.
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The idea of spontaneous generation was disproved by in a experiment involving jars of meat
Answers: 1
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