BIOLOGY: CONCEPTS&INVEST. (LL)
5th Edition
ISBN: 9781264706983
Author: Hoefnagels
Publisher: MCG
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Chapter 18, Problem 2WIO
The amoeba Pelomyxa palustris is a single-celled eukaryote with no mitochondria, but it contains symbiotic bacteria that can live in the presence of oxygen. How does this observation support the endosymbiont theory?
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Chapter 18 Solutions
BIOLOGY: CONCEPTS&INVEST. (LL)
Ch. 18.1 - What features define the protists?Ch. 18.1 - Prob. 2MCCh. 18.1 - Why are evolutionary biologists interested in...Ch. 18.2 - Prob. 1MCCh. 18.2 - Prob. 2MCCh. 18.2 - List and describe the characteristics of the major...Ch. 18.3 - What mode of nutrition do the slime molds and...Ch. 18.3 - Prob. 2MCCh. 18.3 - Prob. 3MCCh. 18.4 - Prob. 1MC
Ch. 18.4 - Prob. 2MCCh. 18.4 - List three diseases caused by flagellated...Ch. 18.4 - Compare and contrast amoebae, foraminiferans, and...Ch. 18.4 - How do ciliates move and eat?Ch. 18.4 - Prob. 6MCCh. 18.5 - Prob. 1MCCh. 18.5 - Prob. 2MCCh. 18.6 - Use the food chain in figure 18.21a to explain why...Ch. 18.6 - Prob. 2MCCh. 18 - Which of the following is NOT a characteristic of...Ch. 18 - Suppose you are studying a protist under a...Ch. 18 - Some protist lineages arose from secondary...Ch. 18 - Prob. 4MCQCh. 18 - Why are DNA sequences useful in the classification...Ch. 18 - Explain why evolutionary biologists are interested...Ch. 18 - The amoeba Pelomyxa palustris is a single-celled...Ch. 18 - How is it adaptive for a red alga to have pigments...Ch. 18 - How are kelp similar to trees? How are they...Ch. 18 - Prob. 5WIOCh. 18 - Prob. 6WIOCh. 18 - Prob. 7WIOCh. 18 - Suppose someone hands you a microscope and a...Ch. 18 - Review the Survey the Landscape figure in the...Ch. 18 - Prob. 2PITCh. 18 - Molecular data have changed protist...
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- Endosymbiosis greatly altered eukaryotes as they acquired organelles. In the red algae shown below, the mitochondria is on left (solid lines), the chloroplast is in the middle (dotted lines), and the nucleus is on the right (dashed lines).arrow_forwardIn secondary endosymbiosis, the plastid organelle is derived from engulfing Prokaryotic algal cell. an True Falsearrow_forwardGiardia is a protozoan parasite that lacks mitochondria. Based on the figure below, what could be the explanation for this. Explain your reasoning.arrow_forward
- Compare the phylogenetic tree of protists with the secondary endosymbiosis theory which proposes how photosynthetic protists evolved. Are both reconcilable? Explain.arrow_forwardDoes the following phylogenetic tree provide evidence to support or refute the endosymbiosis hypothesis? Briefly explain your choice (1-2 sentences) Bacteria a-Proteobacteria Mitochondria Archaea Eukarya Excavata Discicristata Alveolata Stramenopila Rhizaria Plantae Opisthokonta Amoebozoaarrow_forwardDNA 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.arrow_forward
- Describe the features of mitochondria and chloroplasts that support the endosymbiotic theory.arrow_forwardVolvox carteri, an volvocine alga, has approximately 2000 somatic cells and only 16 reproductive or germ line cells. The observation that multicellular individuals, like Volvox, have a much smaller subset of germ line cells compared to somatic cells appears to be general rule. Which of the following is the best evolutionary explanation for why this is the case? A) Organisms can biologically only contain a small number of germ line cells as they are always larger than somatic cells. B) Multicellular individuals with a germ line vs. somatic cell line differentiation only evolved a single time, thus all members of this lineage share the same scheme of more soma cells with a much smaller subset of germ line cells. C) Having a smaller subset of reproductive cells helps reduce the likelihood of cheating from evolving, which in turns prevents the collapse of the multicellular individual system. D) None of the above.arrow_forwardThe 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_forward
- Why are the protists in termites obligate endosymbionts? question # 8arrow_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_forwardSome non-plant organisms like the protist that spreads malaria contain a non-photosynthetic chloroplast called an apicoplast. Crazy! What best explains how protists have evolved apicoplasts?arrow_forward
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Endosymbiotic Theory; Author: Amoeba Sisters;https://www.youtube.com/watch?v=FGnS-Xk0ZqU;License: Standard Youtube License