2.2

• Unicellular organisms


  Made up of only one cell
• Unicellular organisms


  • Amoeba sp.
  • Paramecium sp.
• Amoeba sp.


  • Habitat: Freshwater and damp soil
  • Can change shape
  • Has one nucleus
  • Has contractile vacuole and food vacuole
• Paramecium sp.


  • Habitat: Freshwater
  • Slipper-shape
  • Has cilia
  • Has two nuclei; macronucleus and micronucleus
  • Has contractile vacuole and food vacuole
• Amoeba sp. respiration


  Simple diffusion
• Amoeba sp. feeding


  Phagocytosis
• Amoeba sp. movement


  Extend its pseudopodium
• Amoeba sp. reproduction


  1. Binary fission (favourable condition)

  2. Spore formation (unfavourable condition)
• Amoeba sp. excretion


  Osmoregulation through contractile vacuole
• Paramecium sp. respiration


  Simple diffusion
• Paramecium sp. feeding


  Oral groove
• Paramecium sp. movement


  Beats the cilia
• Paramecium sp. reproduction


  1. Binary fission (favourable condition)

  2. Conjugation (unfavourable condition)
• Paramecium sp. excretion


  Osmoregulation through contractile vacuole