Chapter_28_Test - Chapter 28 Test 1. Protists are alike in...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Chapter 28 Test 1. Protists are alike in that all are a. multicellular. d. nonparasitic. b. photosynthetic. e. eukaryotic. c. marine. 2. Which of the following statements concerning living phytoplanktonic organisms are true? 1. They are important members of communities surrounding deep-sea hydrothermal vents. 2. They are important primary producers in most aquatic food webs. 3. They are important in maintaining oxygen in Earth's seas and atmosphere. 4. They are most often found growing in the sediments of seas and oceans. 5. They can be so concentrated that they affect the color of seawater. a. 1 and 4 d. 2, 3, and 5 b. 1, 2, and 4 e. 3, 4, and 5 c. 2, 3, and 4 3. The strongest evidence for the endosymbiotic origin of eukaryotic organelles is the similarity between extant prokaryotes and which of the following? a. nuclei and chloroplasts d. mitochondria and nuclei b. mitochondria and chloroplasts e. mitochondria and cilia c. cilia and mitochondria 4. According to the endosymbiotic theory of the origin of eukaryotic cells, how did mitochondria originate? a. from infoldings of the plasma membrane, coupled with mutations of genes for oxygen-using metabolism b. from engulfed, originally free-living prokaryotes c. by tertiary endosymbiosis d. from the nuclear envelope folding outward and forming mitochondrial membranes e. when a protoeukaryote engaged in a symbiotic relationship with a protobiont 5. It is nearly impossible to classify protists, but for now, we will use how many major clades of classification? a. 10 b. 5 c. 12 d. 6 e. 7 6. A biologist discovers a new unicellullar organism that possesses more than two flagella and two small, but equal-sized, nuclei. The organism has reduced mitochondria and no chloroplasts. How would you classify this organism? a. apicomplexan d. prokaryote b. diplomonad e. Chlamydomonas c. ciliate 7. Organisms classified as Euglenozoa have previously been classified as protozoans, protista, plants, and animals. Why the confusion? a. Like protozoans, they are unicellular. b. Like animals, many are heterotrophic. c. Like plants, many are photosynthetic. d. A and B only e. A, B, and C
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
8. When a protist possesses two flagella, both are generally used for propulsion. Assuming that a flagellum containing a crystalline rod cannot undulate back and forth, and assuming that two undulatory flagella can produce more effective locomotion than can a single flagellum, which of these organisms should have the least effective locomotion? a. golden algae d. Chlamydomonas b. dinoflagellates e. oomycetes c. euglenids 9. Which of the following marine organisms produce potent neurotoxins that cause extensive fish kills, contaminate shellfish, and create severe respiratory irritation to humans along the shore? a.
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 10/19/2009 for the course BIO 2400 taught by Professor Xtc during the Spring '09 term at École Normale Supérieure.

Page1 / 9

Chapter_28_Test - Chapter 28 Test 1. Protists are alike in...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online