Campbell Biology in Focus (2nd Edition)
2nd Edition
ISBN: 9780321962751
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Jane B. Reece
Publisher: PEARSON
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Textbook Question
Chapter 25, Problem 10TYU
SYNTHESIZE YOUR KNOWLEDGE
These micrographs show one single-celled eukaryote, a tubulinid amoeba, engulfing another, a ciliate. Describe a key feature of eukaryotes suggested by these images, and summarize the role of endosymbiosis in the evolutionary history of the eukaryotes. Are tubulinid amoebas more closely related to all other protists than they are to plants,
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Discuss the adaptations that plants and protists have evolved to invade and manipulate their hosts. ( one example of a plant and one of a protist).
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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
Multicellular animals are thought to have evolved from single-celledprotists resembling the choanoflagellates that exist today. Describesome specific advantages to multicellularity that gave animals anadvantage over their single-celled relatives.
Chapter 25 Solutions
Campbell Biology in Focus (2nd Edition)
Ch. 25.1 - Describe major events in the evolution of early...Ch. 25.1 - Explain why eukaryotes are said to be combination...Ch. 25.1 - Prob. 3CCCh. 25.2 - Summarize the evidence that choanoflagellates are...Ch. 25.2 - MAKE CONNECTlONS Describe how the origin of...Ch. 25.2 - Prob. 3CCCh. 25.3 - Briefly describe the organisms found in each of...Ch. 25.3 - MAKE CONNECTIONS Review Figures 7.2 and 8.5...Ch. 25.3 - Prob. 3CCCh. 25.4 - Justify the claim that photosynthetic protists are...
Ch. 25.4 - Prob. 2CCCh. 25.4 - Prob. 3CCCh. 25 - The oldest fossil eukaryote that can be resolved...Ch. 25 - Prob. 2TYUCh. 25 - Plastids that are surrounded by more than two...Ch. 25 - Prob. 4TYUCh. 25 - Prob. 5TYUCh. 25 - Based on the phylogenetic tree in Figure 25.9,...Ch. 25 - MAKE CONNECTIONS The bacterium Wolbachia is a...Ch. 25 - FOCUS ON EVOLUTION DRAW IT Medical researchers...Ch. 25 - FOCUS ON INTERACTIONS Organisms interact with each...Ch. 25 - SYNTHESIZE YOUR KNOWLEDGE These micrographs show...
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- Test Your Understanding 1. Which of the following is not true of the protists? (a) they are unicellular, colonial, coenocytic, or simple multicellular organisms (b) their cilia and flagella have a 9 + 2 arrangement of microtubules (c) they are prokaryotic, as bacteria and archaea are (d) some are free-living, and some are endosymbionts (e) most are aquatic and live in the ocean or in freshwater pondsarrow_forwardBulleted items are choices for questions Protists, as a group, represent one of the kingdoms of organisms in the eukaryotic domain. In the other kingdoms, the organisms grouped within a kingdom are very closely related and share many unifying features. The many different organisms grouped as protists are not necessarily closely related, and many different types of traits are represented among them. Review the following list of statements, and select which statements are correct descriptions of protists. Check all that apply. Protists represent both heterotrophic and autotrophic nutritional modes. Some protists are colonial. No protists are multicellular. The phylogenetic tree displayed here shows the evolution and relationships between different major protist groups, as scientists currently understand them. It also shows how these different groups of protists are related to animals, fungi, and land plants. The protist groups are highlighted in tan boxes.…arrow_forwardWhile looking through your microscope under 100X total magnification you see a irregular shaped cell (a blob) with an obvious nucleus. You can also see the circulating cytoplasm in the cell cause a portion of the plasma membrane to bulge out in one direction allowing the cell to move to a new location on the slide. What kind protozoan would you say this was?arrow_forward
- You discover a new multicellular, heterotrophic, eukaryotic organism. What is one characteristic that will allow you to classify this new organism as an animal? Group of answer choices cell walls made of chitin structural proteins multicellular haploid stage in its life cycle cell walls made of cellulose external digestionarrow_forwardWhich are correct and which are not correct? 1. Amebae move by the means of pseudopodia, example Entamoeba histolytica 2. Ciliates like Blantidium coli move by numerous hairlike structures 3. Sporozoa, Plasmodium spp. have no visible means of movement 4. Flagellates like Giardia lamblia move with a whip like structure All are matched correctlyarrow_forwardAll protists have ____. chloroplasts only nuclei only mitochondria only both nuclei and mitochondria chloroplasts, nuclei, and mitochondriaarrow_forward
- We know fungi are eukaryotic (have membrane-bound nucleus and organelles). Explain three unique ways fungi are different from other microbes (algae, protozoans, bacteria and archaea). Compare things like cell walls, cell membranes, morphology, reproduction, life cycles. (Words to use in your answer include chitin, cellulose, peptidoglycan, pseudopeptidoglycan, ergosterol, hopanoids, cholesterol,mycelium, hyphae, multinucleate, multicellular, unicellular, nutritional needs, environmental needs, chemoheterotrophy, saprobes, parasites, free-living, reproductive strategies, spores).arrow_forwardDomain Eukarya ___________________means their cells have nuclei and other compartments (____________________). Organisms in domain Eukarya have larger, more complex cells with nuclei. 4 Kingdoms: ________________, Animalia, Fungi, and ________________ Kingdom Protists: Unicellular or multicellular and Autotrophs or heterotrophs Kingdom Animalia: Multicellular,___________________ (by ingestion) Kingdom Fungi: Most are multicellular and are heterotrophs (by ___________digestion) Kingdom Plantae: Multicellular, _______________arrow_forwardThe following groups of protists will be covered in lecture: Amoebazoa, Excavate-euglena, Alveolata: ciliates, dinoflagellates, apicomplexan; Stramenopiles: diatoms and brown algae, and Plantae: chlorophytes. How do these organisms compare in their -general type of nutrition (autotroph, heterotroph), -ecological roles (parasites, decomposers, importance in food chains) -general structures (cell walls, structures that help them move and feed, single vs multicellular) -reproduction (asexual, sexual) -presence or absence of alternation of generations, - degree of complexity of life cycles -habitats that they are found inarrow_forward
- Some molecular evidence suggests that the sister group of animals is not the choanoflagellates, but rather a group of parasitic protists, Mesomycetozoa. Given that these parasites lack collar cells, can this hypothesis be correct? Explain.arrow_forwardSelect all statements that are true about the kindom protista: I. They are mostly unicellular Eukaryotes II. Protists are the most nutrionally diverse of all eukaryotes III. Red algae and green algae are included in this kingdom IV. All protist are multicellular in naturearrow_forwardProtists are a group of eukaryotic organisms that are brought together by scientists mostly by convenience. I) What is the relationship between all protists that ties them together? ii) provide an example of a autotrophic and heterotrophic protists group, iii) what is the relationship between the multicellular eukaryotes and the protists?arrow_forward
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