Chapter 5 Concept Check 1- What theory is supported by evidence sugges.docx

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Chapter 5 Concept Check 1. What theory is supported by evidence suggesting that current eukaryotic cells were once derived from prokaryotic cells that were engulfed by larger cells? the theory is Called Symbiosis, evolution from prokaryetic a to eckervinis 2. True or False: T Eukaryotes and prokaryotes both have flagella for motility. 3. True or False: F All fungi are considered to be harmful to humans. 4. are fungal infections of the body. 5. Just as bacteria can be decomposers, fungi that live off of dead, decaying organic matter are termed 6. Yeast are ovoid cells that reproduce by the process of where part of the cell fragments off to form a new cell. 7. Fungi are a mass of filamentous strands called A mat of fungal hyphae is termed a 8. What two types of asexual spores do fungi produce? 9. What are some negative and beneficial effects of fungi? 10. What is the major habitat requirement for protists? 11. How are algae responsible for causing human disease? 12. Compare and contrast the trophozoite and cyst form of protozoans. 13. List the four major motility classification groups of protists and the type of motility they utilize. 14. Parasitic worms are also known as: 15. List three anatomical or physiological characteristics of helminthes. .

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Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Chapter 16 Protists & Fungi 16.6 General Biology of Protists There are four kingdoms in the Domain Eukarya. Protista, Fungi, Plantae and Animalia All organisms in Eukarya have organelles including a nucleus. Protists vary in size from microscopic to macroscopic (very large) Most protists are unicellular, but they are very complex Most organisms in Protista reproduce by asexual reproduction 17-2 Organizing Organisms Organisms can be categorized by how they obtain nutrients Heterotrophs – organisms that consume food and digest it inside their bodies. Autotrophs – organisms that make their own food using photosynthesis. While we think of plants as doing photosynthesis, some protists and some bacteria can also do photosynthesis. Cyanobacteria make a significant amount of atmospheric oxygen. Decomposers – digest food outside their body and absorb the nutrients across the cell wall. 17-3 Types of Protists Protists can be separated into 3 categories based on their nutrition Protozoa consume food (heterotrophs) and digest it internally. Also they typically can move. Algae that can do photosynthesis (autotrophs). Underscoring the debate over how to categorize protists, some sources list algae as plants, but your book lists them as protists. Slime molds that absorb nutrients that were digested outside their body. 17-4 Protozoa Amoeba proteus Pseudopods - extensions that form when cytoplasm goes in a particular direction Feed by phagocytosis, surrounding prey with pseudopods and digesting it Paramecium caudatum The most structurally complex and specialized of all protozoans The majority are free-living, some are parasitic 17-5 Green algae are ancestral to plants Green algae (Approximately 7,500 species) Not always green Inhabit a variety of environments Oceans, freshwater, snowbanks, bark of trees, backs of turtles Phytoplankton are microscopic autotrophs that live in water. They produce about half of the oxygen available in the atmosphere and form the basis of Algae can form colonies of loosely organized independent cells or end-to-end chains of cells that form filaments. 17-6 Algae Volvox, a colonial green alga A Volvox colony is a hollow sphere with thousands of cells in a single layer on the outside The cells are usually connected by strands of cytoplasm Smaller daughter colonies are contained within the ball Spirogyra, multicellular, filamentous algae Forms long filaments of cells end-to-end Can reproduce asexually and sexually Has a chloroplast that performs photosynthesis Stores glucose in a pyrenoid 17-7 16.8 A Fungus Is Not a Plant Fungi (domain Eukarya) Fungi are heterotrophs that release digestive enzymes into the external environment and digest their food outside the body, then absorb nutrients across their cell walls. They play an important role as decomposers. Fungal cells are different from plant c.

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