Biology - Study Guide
8th Edition
ISBN: 9780321501561
Author: Martha R. Taylor
Publisher: PEARSON EDUCATION (COLLEGE)
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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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Chapter 25 Solutions
Biology - Study Guide
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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- 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_forwardThe first organisms that oxygenated the atmosphere were ______. a. cyanobacteria b. phootrophic organisms c. anaerobic organisms d. allof the abovearrow_forward
- The first forms of life on Earth were thought to be_____. a. single-celled plants b. prokaryotes c. insects d. large animals such as dinosaursarrow_forwardWhich 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_forwardThe first cells were probably (a) photosynthetic (b) aerobes (c) anaerobes (d) a and b (e) a and carrow_forward
- 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 C. an anaerobic archaean species D. a bacterium that thrives in a highly acidic environmentarrow_forwardBased upon your knowledge of photosynthesis and cellular respiration, which of the following types of organisms came first? Provide reasoning to support your claim.arrow_forwardWhich evolutionary pattern is represented by the similarities between these two organisms that live on separate continents? a.) coevolution b.) convergent evolution c.) directional evolution d.) divergent evolutionarrow_forward
- Which of the following describes the organisms and/or processes that were most influential in the creation of early Earth ecosystems? a. Extinction of animals and domination of plants b. Build up the greenhouse gas carbon dioxide c. Prokaryotic production of an oxygen rich environment d. Eukaryotic growtharrow_forwardMitochondria most likely evolved from_______. a. a photosynthetic cyanobacterium b. cytoskeletal elements c. aerobic bacteria d. membrane proliferationarrow_forward_______ are oxygen-releasing photoautotrophs. a. Spirochetes c. Cyanobacteria b. Methanogens d. Bacteriophagesarrow_forward
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