Study Guide for Campbell Biology
11th Edition
ISBN: 9780134443775
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Jane B. Reece, Martha R. Taylor, Michael A. Pollock
Publisher: PEARSON
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Chapter 25, Problem 9TYK
Summary Introduction
Introduction: Cyanobacteria are the unicellular photosynthetic bacteria that produce its own food. It commonly lives in water, which was known to be found about more than 3.5 billion years ago. It is also called as blue-green algae. The activity of cyanobacteria is attributed to many Proterozoic oil deposits. It plays an important role in establishing ecological and evolutionary changes in the earth’s history.
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The first organisms that oxygenated the atmosphere were a. cyanobacteria b. phototrophic organisms c. anaerobic organisms d. all of the above
To which taxonomic group do cyanobacteria belong?a. Domain Archaea c. Domain Bacteriab. Phylum Actinobacteria d. Phylum Fusobacteria
Which of the following extremophiles is the best model for the earliest organisms on Earth?
A. a prokaryote found near hydrothermal vents
B. an archaean capable of surviving in the polar ice caps
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Chapter 25 Solutions
Study Guide for Campbell Biology
Ch. 25 - Why do we say that, for life to have begun, the...Ch. 25 - Prob. 2IQCh. 25 - Prob. 3IQCh. 25 - Prob. 4IQCh. 25 - Prob. 5IQCh. 25 - a. Mammals originated 180 mya but did not change...Ch. 25 - Prob. 7IQCh. 25 - a. According to the model of species selection,...Ch. 25 - Prob. 1SYKCh. 25 - Label the eons, eras, and key events shown on the...
Ch. 25 - Describe three major processes that have...Ch. 25 - Prob. 4SYKCh. 25 - The primitive atmosphere of Earth may have favored...Ch. 25 - Prob. 2TYKCh. 25 - Prob. 3TYKCh. 25 - The half-life of carbon-14 is 5,730 years. A...Ch. 25 - Prob. 5TYKCh. 25 - Prob. 6TYKCh. 25 - Prob. 7TYKCh. 25 - Look back at the Geologic Record in Table 25.1....Ch. 25 - Prob. 9TYKCh. 25 - According to the endosymbiont theory, a. the first...Ch. 25 - Prob. 11TYKCh. 25 - Prob. 12TYKCh. 25 - Prob. 13TYKCh. 25 - Prob. 14TYKCh. 25 - Prob. 15TYKCh. 25 - Prob. 16TYKCh. 25 - Prob. 17TYKCh. 25 - What is meant by the concept of species selection?...
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- What types of organisms can produce their own food required to survive? A. Organisms that can do cellular respiration B. Organisms that have free-floating DNA C. Organisms that can do photosynthesis D. Organisms with a special enzymearrow_forwardCyanobacteria was responsible for the increase in oxygen levels billions of years ago. They play a decisive role in changing the earth’s environment. Explain how are Cyanobacteria related in changing the early earth’s environment which later suitable for the development of other organisms.arrow_forwardExplain how archae are more closely related to Eukarya than to bacteria even though Archae are related. Explain fully a. both are bacteria b. both have cells c. both have nucelus d. both are prokaryotesarrow_forward
- A unicellular organism has a cell wall, a nucleus, chloroplasts, and several flagella. Which classification best matches this organism? O A. prokaryotic eubacteria O B. eukaryotic protist C. prokaryotic archaebacteria O D. eukaryotic plantarrow_forwardA team of scientists study a microorganism that lives in a wetland region. The organism is an obligate anaerobe, and it produces energy using the following reaction: CO2+4H4→CH4+2H2OCO2+4H4→CH4+2H2O In which kingdom does this organism most likely belong? A. Fungi B. Protista C. Archaebacteria D. Eubacteriaarrow_forwardMitochondria most likely evolved from_______. a. a photosynthetic cyanobacterium b. cytoskeletal elements c. aerobic bacteria d. membrane proliferationarrow_forward
- Photosynthesis carried out by one group of ________ resulted in Earths first increase in atmospheric oxygen levels. a. archaea c. protists b. bacteria d. algaearrow_forwardWhich of the following was not present by the end of Precambrian? a. archaea c. fungi b. bacteria d. fisharrow_forwardWhich of the following was likely MOST important for life to begin existing on Earth? A. sunlight B. DNA C. a source of oxygen D. a source of energyarrow_forward
- Which statement best explains why the third domain, Archea, was added to the original two domains of Bacteria and Eukarya? A. scientist discovered that eukaryotes are unicellular B. scientist discovered that eukaryotes have cell walls C. scientists discovered that some prokaryotes have cell walls D. scientists discovered that some prokaryotes live in extreme environmentsarrow_forwardchoose the combination of answers that most accurately completes the statement.Mitochondria likely originated from a. archaea b. invaginations of the cell membrane c. rickettsias d. cyanobacteriaarrow_forwardWhich of the evolutionary sequences below does NOT represent how chloroplasts were derived? A.cyanobacteria → red algae →brown algae B.cyanobacteria → green algae → land plants C. cyanobacteria → green algae → fungi → land plants D. cyanobacteria → green algae → red algaearrow_forward
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