GEN COMBO BIOLOGY ESSENTIALS WITH CONNECT ACCESS CARD
3rd Edition
ISBN: 9781260262643
Author: Marielle Hoefnagels
Publisher: McGraw-Hill Education
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Chapter 15, Problem 2WIO
Summary Introduction
To determine:
The way in which the presence of symbiotic bacteria in amoeba Pelomyxa palustris support the endosymbiotic theory.
Introduction:
Endosymbiotic theory tries to explain the origin of organelles such as mitochondria and chloroplast. These cell organelles have separate set of DNA and according to the endosymbiotic theory these organelles have developed as a result of symbiotic relationship between two separate unicellular organisms that later combined to form a eukaryotic cell.
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What role did the increase of atmospheric oxygen by prokaryotes play in the development of the endosymbiotic relationship between protoeukaryotes and mitochondria?
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).
Although they are not photosynthetic, apicomplexan parasites such as Plasmodium have modified plastids. Describe a current hypothesis that explains this observation
Chapter 15 Solutions
GEN COMBO BIOLOGY ESSENTIALS WITH CONNECT ACCESS CARD
Ch. 15.1 - Prob. 1MCCh. 15.1 - What we can learn from simulations of early Earth?Ch. 15.1 - Prob. 3MCCh. 15.1 - Prob. 4MCCh. 15.2 - Prob. 1MCCh. 15.2 - Without looking at figure 15.9, sketch the...Ch. 15.2 - Prob. 3MCCh. 15.2 - In what ways bacteria and archaea are essential to...Ch. 15.2 - Prob. 5MCCh. 15.3 - Prob. 1MC
Ch. 15.3 - List a logical sequence of evolutionary events...Ch. 15.4 - Prob. 1MCCh. 15.4 - Prob. 2MCCh. 15.4 - Prob. 3MCCh. 15.5 - Prob. 1MCCh. 15.5 - Prob. 2MCCh. 15.5 - Prob. 3MCCh. 15.5 - How do fungi benefit humans?Ch. 15.5 - Prob. 5MCCh. 15 - Prob. 1MCQCh. 15 - Prob. 2MCQCh. 15 - Prob. 3MCQCh. 15 - Prob. 4MCQCh. 15 - Prob. 5MCQCh. 15 - If you were developing a new broad-spectrum...Ch. 15 - Prob. 2WIOCh. 15 - Prob. 3WIOCh. 15 - Prob. 4WIOCh. 15 - Prob. 5WIOCh. 15 - Prob. 1SLCh. 15 - Review the Survey the Landscape figure in the...Ch. 15 - Prob. 2PIT
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- Symbiosis has had a role in eukaryotic development?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