unit 1.1

• What three things do plant cells have that animal cells don’t?

  Vacuole,Chloroplasts, Cell wall
• What happens in the mitochondria (animal)

  most of the aerobic respiration reactions
• What can be found in an animal cell?


  Mitochondria

  Nucleus

  Cell membrane

  Cytoplasm

  Ribosomes
• What can be found in a plant cell?

  Chloroplasts

  Nucleus

  Mitochondria

  Cytoplasm

  Cell membrane

  Cell wall

  Vacuole (gwagolyn)
• Are bacteria cells smaller or bigger than other cells?

  Much smaller
• What unique thing can be found in a bacterial cell?

  Strand of DNA
• What is diffusion 


  Diffusion is the spreading out of particles from an area of high concentration to an area of low concentration
• Whats an easy way of explaining diffusion 


  The particles are spreading out
• Diffusion is the natural tendency for stuff to spread out
• Diffusion happens in both solutions and gases because the particles in these substances are free to move about randomly
• Osmosis is the movement of water molecules across a partially permeable membrane from a region of higher water concentration to a region of lower water concentration
• Partially permeable membrane


  • Has very small holes in it
  • Only tiny molecules (like water) can pass through them
  • Bigger molecules (e.g. sucrose) can't