Protista (Amoeba)

Question 1

protista are

Answer 1

unicellular
eukaryotic
heterotrophic
reproduced by binary fission
lives in fresh water

Question 2

what do amoeba feed on

Answer 2

other protists, plankton and other animals

Question 3

how do amoeba reproduce

Answer 3

binary fission

Question 4

where do they live

Answer 4

fresh water ponds

Question 5

structure of amoeba

Answer 5

cell membrane
nucleus
contractile vacuole
food vacuole
pseudopod

Question 6

contractile vacuole function

Answer 6

controls osmoregulation (expels excess water)

Question 7

pseudopod function

Answer 7

false feet that help them move and capture food

Question 8

cytoplasm function

Answer 8

ectoplasm (strength and support)
endoplasm (force for movement)

Question 9

food vacuole function

Answer 9

secrets acid onto prey which kills it and produces enzymes to digest it.
digested material is absorbed into cytoplasm.
This process is called phagocytosis

Question 10

amoeba that live in seawater do not have a contractile vacuol, why??

Answer 10

because sea water has true same concentration as the cytoplasm in amoeba

Question 11

contractile vacuole process

Answer 11

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

Question 12

osmosis definition

Answer 12

the movement of water from an area of high water conc to low water conc across a semi permeable membrane