Protists

Question 1

What are prokaryotes?

Answer 1

Bacteria

Question 2

What are eukaryotes?

Answer 2

All organisms apart from bacteria

Question 3

What is the most important characteristic of prokaryotes?

Answer 3

They do not have a membrane-bound nucleus or organelles and have no nucleus (DNA floats in the cell - circular DNA)

Question 4

What is the most important characteristic of eukaryotes?

Answer 4

Eukaryotic cells contain a nucleus and organelles bound by membranes and have a nucleus (linear DNA)

Question 5

What are protists?

Answer 5

Eukaryotic unicellular organisms

Question 6

What type of protists are there?

Answer 6

Animal-like
Fungus-like
Plant-like

Question 7

What are protozoa?

Answer 7

Animal-like protists (because they can move)

Question 8

Where do protozoa appear?

Answer 8

In ponds and wet places

Question 9

What are 3 groups of protozoa (grouped by movement type)?

Answer 9

Amoebas - move using pseupods
Ciliates - move using cilia
Flagellates - move using flagellum

Question 10

What are the organelles of protozoa?

Answer 10

Nucleus/nuclei - macronucleus (the bigger one) is responsible for the cell’s life
Cytopharynx - oral groove (cell eats food with this)
Food vacuole - food is taken here
Contractile vacuole - unnecessary water and waste minerals are released outside the cell (excreted)

Question 11

What can you say about amoebas?

Answer 11

• heterotrophs
• movement: pseudopods
• the body constantly changes

Question 12

What can you say about euglena?

Answer 12

• autotrophs
• movement: flagella
• have an eyespot for phototaxis (moves towards a light source)
• have chloroplasts for photosythesis

Question 13

What can you say about paramecium?

Answer 13

• heterotrophs
• movement: cilia
• have a macronucleus (for life functions) and a micronucleus (for reproduction)