Chap31AnswersReview Questions

Chap31AnswersReview Questions - Chapter 31 Answers to...

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Chapter 31 Answers to Review Questions 1. The Protista have been grouped together for convenience, rather than grouped together because of evolutionary relationships to one another. 2. Eukaryotic mitochondria are probably derived from symbiotic nonsulfur purple bacteria, apparently in a single event because all mitochondria are the same. All eukaryotes but Pelomyxa and a few other groups possess mitochondria. 3. The three classes are the chloroplasts of red algae, containing chlorophyll a, carotenoids, and phycobilins; the chloroplasts of brown algae, diatoms, and dinoflagellates, containing chlorophylls a and c, carotenoids, and other yellow-brown pigments; the chloroplasts of the green algae, euglenoids, and plants, containing chlorophylls a and b and carotenoids. These were all certainly derived from bacteria-from cyanobacteria in the case of the red algae. 4. Fungi have chitinous cell walls, whereas oomycetes have cellulose walls. They are saprobes or parasites and are distinguished from other protists because they have zoospores with unequal flagella. They are considered harmful because they cause disease in aquatic plants and animals and caused
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Chap31AnswersReview Questions - Chapter 31 Answers to...

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