Brock Biology of Microorganisms, Books a la Carte Plus Mastering Microbiology with Pearson eText -- Access Card Package (15th Edition)
15th Edition
ISBN: 9780134603940
Author: Michael T. Madigan, Kelly S. Bender, Daniel H. Buckley, W. Matthew Sattley, David A. Stahl
Publisher: PEARSON
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Chapter 18.1, Problem 1CR
Summary Introduction
Endosymbiosis is a process in which one organism co-exists inside other organism in order to gain mutual benefits. Endosymbiosis is a hypothesized process by which prokaryotic cell gave rise to first cell of eukaryotes. The process of endosymbiosis can be categorized as “primary and secondary” endosymbiosis.
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DNA sequence data for a diplomonad, a euglenid, a plant, and an unidentified protist suggest that the unidentified species is most closely related to the diplomonad. Further studies reveal that the unknown species has fully functional mitochondria. Based on these data, at what point on the phylogenetic tree in Figure 1 did the mystery protist’s lineage probably diverge from other eukaryote lineages? Explain.
Please briefly describe the idea of endosymbiosis and its role in protist evolution-relate to the idea of function of the group.
A)
A major difference between eukaryotic cells and prokaryotic cells is that eukaryotic cells
Group of answer choices
exhibit little if any compartmentalization of function
are generally smaller than prokaryotic cells
have a large degree of internal organization
lack organelles
have little if any internal organization
B)
Which of the following statements about protists is false?
Group of answer choices
Some protists are mixotrophic
Certain protists share a common ancestor with land plants
Some protists are photosynthetic prokaryotes which are similar to the
ancestral chloroplast
Protists are a polyphyletic group of organisms that often bear little resemblance to each other
Although most protists are unicellular, some protists are multicellular as well
Chapter 18 Solutions
Brock Biology of Microorganisms, Books a la Carte Plus Mastering Microbiology with Pearson eText -- Access Card Package (15th Edition)
Ch. 18.1 - Prob. 1MQCh. 18.1 - Prob. 2MQCh. 18.1 - Prob. 3MQCh. 18.1 - Prob. 1CRCh. 18.2 - Prob. 1MQCh. 18.2 - Prob. 2MQCh. 18.2 - Prob. 3MQCh. 18.2 - Ribosomal RNA gene sequences do not yield as...Ch. 18.3 - Contrast the two nutritional options for Euglena.Ch. 18.3 - Prob. 2MQ
Ch. 18.3 - Prob. 3MQCh. 18.3 - Prob. 1CRCh. 18.4 - Prob. 1MQCh. 18.4 - Prob. 2MQCh. 18.4 - What are apicoplasts, which organisms have them,...Ch. 18.4 - Three groups make up the alveolates: ciliates,...Ch. 18.5 - Prob. 1MQCh. 18.5 - Prob. 2MQCh. 18.5 - Prob. 3MQCh. 18.5 - Prob. 1CRCh. 18.6 - Prob. 1MQCh. 18.6 - How are chlorarachniophytes thought to have...Ch. 18.6 - The Rhizaria include diverse protists such as the...Ch. 18.7 - Prob. 1MQCh. 18.7 - Compare and contrast the lifestyles of gymnamoebas...Ch. 18.7 - Prob. 3MQCh. 18.7 - Prob. 1CRCh. 18.8 - What are conidia? How does a conidium differ from...Ch. 18.8 - Prob. 2MQCh. 18.8 - Prob. 3MQCh. 18.8 - Prob. 1CRCh. 18.9 - Why is the mold Penicillium economically...Ch. 18.9 - Prob. 2MQCh. 18.9 - Prob. 3MQCh. 18.9 - Prob. 1CRCh. 18.10 - Prob. 1MQCh. 18.10 - Prob. 2MQCh. 18.10 - Prob. 1CRCh. 18.11 - Prob. 1MQCh. 18.11 - Prob. 2MQCh. 18.11 - Prob. 1CRCh. 18.12 - Prob. 1MQCh. 18.12 - Prob. 2MQCh. 18.12 - Prob. 1CRCh. 18.13 - Prob. 1MQCh. 18.13 - Prob. 2MQCh. 18.13 - Prob. 1CRCh. 18.14 - What traits link cyanobacteria and red algae?Ch. 18.14 - Prob. 2MQCh. 18.14 - Prob. 1CRCh. 18.15 - What phototrophic properties link green algae and...Ch. 18.15 - What is unusual about the green algae...Ch. 18.15 - Prob. 3MQCh. 18.15 - Green algae are common in aquatic environments and...Ch. 18 - Explain why the process of endosymbiosis can be...Ch. 18 - Summarize the evidence for endosymbiosis. How...Ch. 18 - Prob. 3AQ
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- The prtists that causes malaria evolved from a photosynthetic ancestor and has the remnant of a chloroplast. The organelle no longer functions in photosynthesis, but it remains essential to the protist. Why might targeting this organelle yield an antimalarial drug that produces minimal side effects in humans?arrow_forwardIf an ancestral protist was classified as an opisthokont, then what should be true of this protist? -They should also have given rise to the plants. -They should perform heterotrophy by secretion of exoenzymes. -Like diplomonads and parabasalids, they should bear multiple flagella. -They should be parasitic -They should be the common ancestor of the basidiomycetes and animals.arrow_forwardWhich of the following structures in chlorarachniophytes provides evidence that they evolved through the endosymbiosis of a green alga by a heterotrophic eukaryote? A. food vacuole B. nucleomorph C. mitosomes D. flagellaarrow_forward
- If you were to create an evolutionary tree in which amoebas were included within the kingdom of organisms to which they were the most closely related (rather than with protists, where they are currently placed), where would you put them?arrow_forwardExcept for the Plantae, what best describes the origin of chloroplasts in most other eukaryotes? Group of answer choices Chloroplasts evolved independently in different lineages Primary endosymbiosis An amoeboid protist engulfed another protist that had chloroplasts in its tissues Mitochondria were converted to perform photosynthetic functions Eukaryotes outside the Plantae don’t have chloroplastsarrow_forwardPlease answer ASAP Which statement best describes the primary difference between bacteria and protists? In terms of cellular organization, protists are multicellular microbes and are prokaryotes. In terms of cellular organization, bacteria are single-celled microbes and are prokaryotes. In terms of cellular organization, protists are multicellular microbes and are chemoautotrophs. In terms of cellular organization, bacteria are single-celled microbes and are eukaryotes.arrow_forward
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