Protozoa

Question 1

Name three diseases caused by protozoa

Answer 1

Malaria
Sleeping sickness (Trypanosome)
Toxoplasmosis

Question 2

Outline the process of membrane infolding

Answer 2

Part of the plasma membrane folds back into the cells cytoplasm

Question 3

Outline the process of endosymbiosis

Answer 3

Small prokaryotic cells are enveloped by larger prokaryotic cells (which provide them with nutrients and protection), the small cells develop into mitochondria and chloroplasts and gain a symbiotic relationship with the host cell.

Question 4

Outline the 5 classifications of protozoa

Answer 4

Ciliates
- small cilia cover the cell, they are used for feeding and movement
Amoeba
- move via a plasma gel
Euglena
- have choloroplasts and a flagella
Primitive algae
- unicellular, used in carbon fixing, used in forensic investigations
Slime moulds
- single celled when there are sufficient nutrients, aggregate into colonies when there are not