Protista SAQs.docx

Kingdom Protista SAQs - What are eukaryotic organisms?  1. Eukaryotic organisms have a nucleus and cell enclosed organelles, - What are prokaryotic organisms? a. Prokaryotic organisms don't have a nucleus or cell enclosed organelles.  - What are heterotrophic organisms?  1...

Kingdom Protista SAQs - What are eukaryotic organisms?  1. Eukaryotic organisms have a nucleus and cell enclosed organelles, - What are prokaryotic organisms? a. Prokaryotic organisms don't have a nucleus or cell enclosed organelles.  - What are heterotrophic organisms?  1. Heterotrophic organisms can't make their own food and eat other organisms.  - What are autotrophic organisms? A. Autotrophic organisms can make their own food. - Name the method by which amoeba reproduce  1. binary fission  - What is the function of pseudopodia on an amoeba?  1. for movement and to catch prey  - What is the function of the contractile vacuole in an amoeba?  1. controls osmoregulation  - What is osmoregulation? A. **Osmoregulation** is the means by which cells keep the concentration of cell cytoplasm or blood at a suitable concentration. - What is the function of the food vacuole in an amoeba?  1. secretes an acid onto the prey which kills it and produces enzymes to digest it.  - Why is the contractile vacuole more active in freshwater than saltwater? 1.  The contractile vacuole is more active in freshwater because the cytoplasm is more concentrated than its external environment. The cytoplasm has the same concentration as saltwater, so there is no danger of bursting.  - Describe the process of phagocytosis  A. The food vacuole secretes an acid onto the prey which kills it and produces enzymes to digest it. The digested material is then absorbed into the cytoplasm.  - Name a disease caused by amoeba  1. Malaria/ sleeping sickness