Protists (Eukaryotes) Worksheet Answers

Protists (Eukaryotes) Worksheet 1. Name the four classes of Eukaryotes. Protists, Plants, Fungi, Animals 2. Protists can be: a. unicellular b. a colony of cells c. multicellular d. any of these 3. What is the range in size of protists? Microscopic to over 200 meters] 4. In this class we will only look at two major classifications of protist. What are they? algae and protozoans 5. Why were algae once considered a plant? They contains chlorophyll and can photosynthesize 6. What is diatomaceous earth used for? It is mined for filtering agents; soundproofing materials; and gentle polishing abrasives (silver polish and toothpaste) 7. What does bioluminescent mean? producing light 8. What can dinoflagellates produce if they undergo a population explosion and what can happen to fish? to humans? Neurotoxins; massive fish kills; Humans may suffer from paralytic shellfish poisoning where the respiratory organs are paralyzed if they consume shellfish that have fed during an outbreak 9. What are the three main groups of seaweed? brown, red, and green algae 10. How are seaweed used? Used in stabilizing and gelling foods, cosmetics, pharmaceuticals, and industrial products; algae make water-based products thicker, creamier, and more stable over extreme differences in temperature, pH, and time. For example, preventing ice crystals from forming in ice cream 11. Algae can reproduce: a. asexually b. sexually c. both a and b 12. Protozoans are a. unicellular b. a colony of cells c. multicellular d. any of these 13. How to protozoans usually reproduce? Usually reproduce asexually by mitotic cell division. 14. Protozoans are: 15. Algae are: a. autotrophic (make their own food) b. heterotrophic (obtain their own food) a. autotrophic (make their own food) b. heterotrophic (obtain their own food) 16. Ciliates move by ________cilia_____________ and they may contain _____trichocysts___________ which can discharge long, barbed threads useful for defense and for capturing prey. These can sometimes release poisons. 17. What is a psuedopod? A false foot 18. All sporozoans are ______parasites_______. One sporozoan, Plasmodium causes malaria which is the most widespread and dangerous protozoan disease (350-500 million cases/yr with one million deaths); transmitted by mosquitoes; invades RBCs, cells burst and release toxic substances into the blood. 19. Euglenoids are an example of zooflagellates, all of which move by ____flagella____. 20. An intestinal disorder caused by a zooflagellate in which symptoms include diarrhea, stomach and/or intestinal cramping, excess gas and may last several weeks is caused by Giardia lamblia, a zooflagellate. It lives in the intestines of animals (including humans); commonly spread by drinking contaminated water. 21. Are antibiotics effective against Giardiasis? Yes; again, this goes back to your definitions – this is not a bacterium. 22. Organisms that are suspended in the water and serve as food for heterotrophic protists and animals are called ______plankton_______. 23. Phytoplankton are organisms that float on or near the surface of the water. Most are rounded and single-celled. All phytoplankton use photosynthesis for their energy, but some get additional energy by consuming other organisms. 24. The most common phytoplankton are diatoms and dinoflagellates. 25. Zooplankton are ocean ‘animals’ that don't swim at all or are very weak swimmers, and they drift or move with ocean currents. They can be found in the sunlit zone and in deep ocean waters. 26. Zooplankton range in size from tiny microbes to jellyfish, although most zooplankton are tiny, single-celled organisms.