Biology 2e
2nd Edition
ISBN: 9781947172517
Author: Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher: OpenStax
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Textbook Question
Chapter 23, Problem 24CTQ
Some aspects of eukaryotes are more similar to Archaea, while other aspects of eukaryotic cell composition appear more closely related to Bacteria. Explain how endosymbiosis could resolve this paradox.
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Some aspects of eukaryotes are more similar to archae while other aspects of eukaryotic cell composition appear closely related to bacteria. Explain how endosymbiosis could resolve this paradox.
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).
According to the endosymbiotic theory, protoeukaryotes did not have ribosomes until the endosymbiosis with mitochondria was established.
Chapter 23 Solutions
Biology 2e
Ch. 23 - Figure 23.5 What evidence is there that...Ch. 23 - Figure 23.25 Which of the following statements...Ch. 23 - Figure 23.28 Which of the following statements...Ch. 23 - What event is thought to have contributed to the...Ch. 23 - Which characteristic is shared by prokaryotes and...Ch. 23 - Mitochondria most likely evolved by ___________ ....Ch. 23 - Which of these protists is believed to have...Ch. 23 - In 2016, scientists published the genome of...Ch. 23 - Which of the following observations about a...Ch. 23 - Protists that have a pellicle are surrounded by...
Ch. 23 - Piotists with the capabilities to perform...Ch. 23 - Which of these locomotor organs would likely be...Ch. 23 - Alternation of generations describes which of the...Ch. 23 - The amoeba E. histolytica is a pathogen that forms...Ch. 23 - Which protist group exhibits mitochondrial...Ch. 23 - Conjugation between two Paramecia produces total...Ch. 23 - What is the function of the raphe in diatoms?...Ch. 23 - What genus of piotists appears to contradict the...Ch. 23 - A marine biologist analyzing water samples notices...Ch. 23 - An example of carbon fixation is photosynthesis...Ch. 23 - Which parasitic protist evades the host immune...Ch. 23 - Which of the following is not a way that piotists...Ch. 23 - Describe the hypothesized steps in the origin of...Ch. 23 - Some aspects of eukaryotes are more similar to...Ch. 23 - Explain in your own words why sexual reproduction...Ch. 23 - Giaidia iamblia is a cyst-forming protist parasite...Ch. 23 - Explain how the definition of protists ensures...Ch. 23 - The chllorophyte (green algae) genera Ulva and...Ch. 23 - Why might a light-sensing eyespot be ineffective...Ch. 23 - Opisthokonta includes animals and fungi, as well...Ch. 23 - Describe two ways in which paramecium differs from...Ch. 23 - How does killing Anopheles mosquitoes affect the...Ch. 23 - Without treatment, why dees African sleeping...Ch. 23 - Describe how increasing stress to the ocean would...
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- Which of the following does not possess cilia or flagella? a.)Amoeba b.)Paramecium c.)Trypanosoma d.)Mastigamoebaarrow_forwardare these found in eukaryotes, prokaryotes or both? 1. nucleus 2. cell membrane 3. inclusion bodies 4. cell wall 5. peptidoglycan 6. genome 7. endoplamis reticulum 8. chloroplastsarrow_forwardThe cell wall component known as peptidoglycan is the unique identifying molecule of: the Archaeobacterial kingdom the Eubacterial kingdom the Animal kingdom the Fungal kingdom the Plant kingdomarrow_forward
- A filamentous organism has been isolated from decomposing organic matter. This organism has a cell wall but no chloroplasts. How would you classify this organism?arrow_forwardIn general terms, describe the structure and content of a "typical" protozoan and show how it largely conforms to that of a eukaryotic cell.arrow_forwardSome bacteria have a tube which allows materials to move directly into or out of the cytoplasm. This tube is called a ___. cilium flagellum genera pilusarrow_forward
- Short answer most pathogenic bacteria are mesophiles explain why 23. (short answer) List the most important function(s) of the cytoplasmic membrane in prokaryotes. AreExplain.there any differences in between functions of prokaryotic 29. (short answer) Antibiotics such as chloramphenicol interfere with the ability of bacteria to synthesize protein by targeting their ribosomes. Explain why ribosomes are a good target for a useful antibiotic. proteins. 30. (short answer) Why does oxygen kill obligate anaerobes? Obligate anaerobes. live onlu in absence of as oxygen, They do not possess the defenses that make aerobic life possible and therefore cannot survive in air. 31. (short answer) Parasitic bacteria, which live intracellularly in host cells, typically have smaller genomes than other bacteria. Why does this observation make sense? (Hint: it is NOT deletional bias.) 32. (short answer) Viruses variously depend on their host cell for parts of the viral replication and maturation…arrow_forwardWhy would parasitic eukaryotes like Taenia or Plasmodium need intricate life cycles?arrow_forwardHow can you differentiate between Giardia sp. and Trypanosoma sp.? Describe at least two visible differences between these protists.arrow_forward
- are these found in eukaryotes, prokaryotes or both? 1. nuclues 2. cell membrane 3. inclusion bodies. 4. cell wall 5. peptidoglycan 6. genome 7. endoplasmic rericulum 7. chloroplastsarrow_forwardWhat terms would describe a prokaryote that has is covered in a thick peptidoglycan layer, gets it's energy from eating other prokaryotes, and does not need oxygen to survive?arrow_forwardTrue or False: Organisms in the domain Archaea are more closely related to the domain Eukarya due to the presence of a true nucleus in both groups.arrow_forward
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