Amoeba sp.

Habitat: Freshwater and damp soil

Structural characteristics:

• Can change shape
• Has one nucleus
• Has contractile vacuole and food vacuole

Respiration: Simple diffusion

Feeding: Phagocytosis

Movement: Extend its pseudopodium

Reproduction: 

• Binary fission (favourable condition)
• Spore formation (unfavourable condition)

Excretion: Osmoregulation through contractile vacuole

Paramecium sp.

Habitat: Freshwater

Structural characteristics:

• Slipper-shape
• Has cilia
• Has two nuclei; macronucleus and micronucleus
• Has contractile vacuole and food vacuole

Respiration: Simple diffusion

Feeding: Oral groove

Movement: Beats the cilia

Reproduction: 

• Binary fission (favourable condition)
• Conjugation  (unfavourable condition)

Excretion: Osmoregulation through contractile vacuole