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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- Cyanobacteria 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_forwardA 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_forward
- A 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_forwardThe first forms of life on Earth were thought to be_____. a. single-celled plants b. prokaryotes c. insects d. large animals such as dinosaursarrow_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 is organisms is NOT eukaryotic? a. amoeba b. centipede c. bacteria d. earthwormarrow_forward
- Which is a piece of evidence that supports the endosymbiotic theory? Select all that apply. (Group of answer choices) A. many bacteria are resistant to antibiotics B. eukaryotic cells have cell membranes C. mitochondria have their own DNA D. chloroplast DNA is more similar to cyanobacteria DNA than eukaryotic DNA E. ribosomes are present in eukaryotic cells F. mitochondria must divide to multiply, cells can't build themarrow_forwardIn what order did events occur that led to life on Earth? (1) appearance of aerobic organisms, (2) appearance of photosynthetic organisms, (3) appearance and increase of O2 in the atmosphere, (4) self-replicating RNA developsa. 4, 2, 3, 1b. 2, 3, 1, 4c. 3, 1, 4, 2d. 1, 2, 4, 3arrow_forwardWhich statement about bacteria is true? a. Most bacteria cause disease. b. They are responsible for morning breath. c. Bacteria are not a monophyletic group. d. The biomass of bacteria is smaller than that of all the plants and animals. e. They are all single-celled with one or more linear molecules of DNA.arrow_forward
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