2.2 Living Processes in Unicellular Organisms

Question 1

What is the reproduction of Amoeba.sp ?

Answer 1

Binary fission

Question 2

Explain the reproduction of Amoeba.sp .

Answer 2

• amoeba grows to a certain size
• nucleus divide into two
• cytoplasm divides into two
• two new cells are formed

Question 3

What is the reproduction of Paramecium.sp ?

Answer 3

• Binary fission (suitable circumstances)

- Conjugation (not suitable circumstances)

Question 4

Explain the Conjugation process of Paramecium.sp .

Answer 4

• 2 paramecium stick together & exchange genetic materials

- separates & formed a new cells

Question 5

What happen during the Excretion & Osmoregulation of both cells .

Answer 5

• water enters the cell via osmosis
• water diffuses into the contractile vacuole
• vacuole expands to its maximum size
• vacuole contracts & get rid of the water

Question 6

What is the nutrition of an Amoeba.sp called ?

Answer 6

Phagocythosis

Question 7

How does Phagocythosis works ?

Answer 7

• Amoeba moves towards its food using pseudopodium
• Pseudopodium surrounds & turned the food into food vacuoles
• Food vacuoles combined with lysosome, and is digested with lysosome enzyme
• Nutrients are absorbed, undigested food are excreted