Ch2 : Protista (Amoeba)

Question 1

What kingdom?

Answer 1

Protista

Question 2

Autotroph or heterotroph
omnivore, carnivore or herbivore

Answer 2

Heterotroph
Omnivore

Question 3

Name the parts of the Amoeba

Answer 3

-Cell membrane
-cytolpasm(endoplasm and ectoplasm)
-Nucleus
-Waste products
-Pseudopodia
-Fat droplets
-Food vacuole
-Contractile vacuole

Question 4

Describe the cytoplasm

Answer 4

-Ectoplasm (outer): clear and stiff
-Endoplasm (inner): grainy due to food vacuoles and waste, more fluid, contains fat droplets

Question 5

Describe the contractile vacuole

Answer 5

-Function: osmoregulation
-Needed because amoeba live in freshwater, so their cytoplasm is more concentrated than the environment (amoeba would burst)

Question 6

Explain the process of osmoregulation

Answer 6

1. Water enters due to osmosis
2. Excess water enters the contractile vacuole
3. Contractile vacuole swells
4. Contractile vacuole touches the cell membrane
5. Contractile vacuole expels excess water

Question 7

Describe the food vacuoles

Answer 7

-Secretes acids and enzymes to kill and digest prey
-Digested material is absorbed from the food vacuoles into cytoplasm

Question 8

Describe the pseudopodia

Answer 8

-They extend in the direction amoeba wants to move
-Endoplasm flows into pseudopodia to allow cell to move
-Also used to surround prey