protists

Features of protists

Have a true nucleus, can be unicellular or multicellular, heterotroph or autotroph

Example of a unicellular protist

amoeba

Example of a heterotrophic protist

amoeba

Example of a multicellular protist

algae

Example of a autotrophic protist

green algae

Where does amoeba live?

Fresh water e.g. pond

What do you need to see amoeba?

Microscope (microscopic)

Amoeba structure

Cytoplasm surrounded by a cell membrane, they have no fixed shape, have pseudopodia (false feet), contractile vacuole

Draw the structure of an amoeba

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Nucleus (function)

controls the activity of the cell

Food vacuole (function)

digests ingested food particles. Secretes enzymes digest prey

Pseudopodia (function)

"false feet". Extend in whatever amoeba needs to move

Contractile Vacuole (function)

Osmoregulation

Cell Membrane (function)

allows diffusion of gases/water

Contractile Vacuole

Water enters amoeba due to osmosis. Vacuole collects water that enters the amoeba. Moves to edge of the cell where it bursts and releases the water collected out of the cell. A new one is formed and it repeats. This requires energy