Protista (Amoeba)

Question 1

In which kingdom is amoeba?

Answer 1

Protista

Question 2

What is an amoeba?

Answer 2

It is microscopic organism that lives at the bottom of shallow freshwater ponds and streams (other species of Amoeba are found in sea water).

Question 3

Is an amoeba heterotrophic or autotrophic?

Answer 3

Heterotrophic

Question 4

Is an amoeba carnivorous, herbivorous or omnivorous?

Answer 4

Omnivorous

Question 5

What are the elements of an amoeba?

Answer 5

Pseudopods, ectoplasm, endoplasm, cell membrane, contractile vacuole, food vacuole, nucleus, digestive vacuole

Question 6

What is the function of the cell membrane?

Answer 6

• Keeps the cell contents in place
• Allows gases to diffuse in and out through the cell membrane

Question 7

What is the function of the nucleus?

Answer 7

Controls the cell

Question 8

What is the function of the amoeba’s food vacuole?

Answer 8

• Secrete acid and enzymes to kill and then digest the prey.
• Digested material is absorbed from the food vacuole into the cytoplasm.

Question 9

What is the function of the amoeba’s pseudopodia?

Answer 9

• Extend in the direction amoeba wishes to move. The cytoplasm (endoplasm) moves or flows into the pseudopodia causing the cell to move.
• Pseudopodia are also used to surround (engulf) the prey.

Question 10

What is the function of the amoeba’s contractile vacuole?

Answer 10

• Amoeba lives in fresh water. This means its cytoplasm is more concentrated than its external environment. As a result, water enters Amoeba by osmosis.
• The contractile vacuole collects water that enters Amoeba. It then expands, touches the cell membrane and bursts to expel the water. Without a contractile vacuole Amoeba would expand and burst.

Question 11

Movement of contractile vacuole?

Answer 11

Look at diagram of how contractile vacuole moves around amoeba and releases excess water.