BIO PAPER 1

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5 Terms

1
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what are the stages of mitosis?

  1. prophase: nucleus dissolves, genetic material is duplicated

  2. metaphase: 2 sets of chromosomes move to opposite sides of the cell

  3. anaphase: organelles are duplicated

  4. telophase: cell divides to produce 2 genetically identical daughter cells

2
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what is diffusion

net movement of particles from an area of HIGH concentration to LOW concentration (passive process: no energy required)

3
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what is osmosis?

the net movement of water particles through a semi-permeable membrane from an area of HIGH concentration to LOW concentration (passive process: no energy required)

4
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what is active transport

the net movement of particles from an area of LOW concentration to HIGH concentration or against the concentration gradient (not a passive process bc it requires energy)

5
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what are the sizes of cells?

  • 1cm=1×10^-2

  • 1mm=1×10^-3

  • 1micrometer=1×10^-6

  • 1nanometer=1×10^-9