EBK BIOLOGY
5th Edition
ISBN: 8220101337627
Author: Maier
Publisher: PEARSON
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Chapter 13, Problem 1AAATB
Unless handled properly by living systems, oxygen can be quite damaging to cells. Imagine an ancient nucleated cell that ingests an oxygen-using bacterium. In an environment where oxygen levels are increasing, why might natural selection favor a eukaryotic cell that did not digest the bacterium but instead provided a “safe haven” for it?
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According to Lynn Margulis's theory of endosymbiosis, bacteria entered large cells either as parasites or as undigested prey as
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Chapter 13 Solutions
EBK BIOLOGY
Ch. 13 - How many different species have been identified by...Ch. 13 - Plants experienced an adaptive radiation after the...Ch. 13 - How are hypotheses about the evolutionary...Ch. 13 - Which of the following kingdoms or domains is a...Ch. 13 - Comparisons of ribosomal RNA among many different...Ch. 13 - On examining cells under a microscope, you notice...Ch. 13 - The mitochondria in a eukaryotic cell ___________....Ch. 13 - Prob. 8LTBCh. 13 - Prob. 9LTBCh. 13 - Phylogenies are created based on the principle...
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- Bacteria are known to change the kinds of fatty acids they produce as the temperature of their environment changes. What types of changes in fatty acids would you expect as the temperature drops? Why would this be adaptive?arrow_forwardRead this passage from the lesson and answer the questions that follow. Domains The six-kingdom system didn't show that all four eukaryote kingdoms are more closely related to each other than to the two bacteria kingdoms. It also didn't show that the two bacteria kingdoms are as different from each other as they are from the eukaryote kingdoms. To show these similarities and differences, a new taxon, called the domain, was introduced. It was defined as a taxon higher than the kingdom. The Three-Domain System In 1990, a new classification system was introduced that contained three domains: Bacteria, Archaea, and Eukarya. The Bacteria domain was formerly the Eubacteria kingdom, and the Archaea domain was formerly the Archaebacteria kingdom. The Eukarya domain includes all four eukaryote kingdoms: plants, animals, protists, and fungi. The three-domain system emphasizes the similarities among eukaryotes and the differences among eukaryotes, bacteria, and archaea. By using domains, these…arrow_forwardUsing the analogy of a one-hour countdown timer, when did prokaryotes originate? When did the colonization of land occur?arrow_forward
- Which of the following is true regarding the diversity of life ? a) Domain Archaea does not contain any disease-causing organisms. b) Bacteria can vary greatly in size and range up to 700 µm in length Microbial Eukarya may have first arisen two billion years ago, well before fungi, plants c) animal d) All of the above are true 7:33 /arrow_forwardWhich of the following statements are TRUE about organisms in the Domain Bacteria? I. Consist of bacteria and cyanobacteria II. Some are photoautotrophs III. Genetic material is a single stranded DNA IV. Organelles are not presentarrow_forwardIn the domain system of classification, prokaryotes are divided into two domains: Bacteria and Archaea. The two domains differ in all BUT one feature. Which feature do they have in common? A. They both thrive in extreme environments. B. They both have prokaryotic cells. C. They both are able to live only under anaerobic conditions. D. They both have identical cell walls.arrow_forward
- Choose one prokaryote (bacteria or archaea) AND one protest. You can choose a species or more general taxonomic group of interest. Then address the following questions for each. 1. What does the organism look like? Describe or include an image. 2. How does it obtain energy? 3. How does it reproduce? 4. What are its close relatives in the tree of life? 5. Why is it important from a human perspective?arrow_forwardMicrobiologists have announced the discovery of over 30 new species of bacteria that thrive between the teeth and gums of humans. The bacteria could not be grown in the researcher's laboratories, nor were any of them ever observed via and kind of microscopy. If they couldn't culture them or see them, how could the researchers know they discovered a new species? If they couldn't examine the cells for the presence of a nucleus, how did they determine that the organisms were prokaryotes and not eukaryotes?arrow_forwardAccording to the endosymbiotic theory, which of the following is NOT true about the evolution of life on earth? Eukaryotes and prokaryotes appeared at about the same time and evolved independently from each other. O None of the other four answers (all are true statements) Eukaryotes evolved from symbiotic prokaryotes living inside other prokaryotes Mitochondria and chloroplasts are in some ways similar to prokaryotes The first life on earth was simple organisms, similar to today's prokaryotesarrow_forward
- This domain is characterized by ancient bacteria that can live in extreme environments, such as volcanoes eukarya bacteria prokarya archaeaarrow_forwardScientific evidence suggests that cells evolved as symbiotic relationships between bacteria (or proto-bacteria) that became cell organelles, including mitochondria. a) True b) Falsearrow_forwardThe production of by prokaryotes increased its atmospheric concentration and enabled more complex forms of life to evolve. (a) carbon dioxide (b) oxygen (c) nitrogen (d) all of the abovearrow_forward
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