Loose-leaf Version for What is Life? A Guide to Biology 3e & LaunchPad for Phelan's What is Life? (Six Month Access) 3e
3rd Edition
ISBN: 9781319022471
Author: Jay Phelan
Publisher: W.H. Freeman & Co
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Question
Chapter 10, Problem 1SA
Summary Introduction
To review:
The groups of organisms currently living on earth that most resemble the earliest life forms.
Introduction:
The first life forms were primitive single cells, with genetic material and only an outer lipid membrane.
Expert Solution & Answer
Explanation of Solution
The first life forms were similar to today’s prokaryotes. They were prokaryotic cells, with macromolecules inside them, having no membrane bound structures. Fossils of such life forms have been found in Australia and South Africa.
Conclusion
The prokaryotes currently living on earth are most similar to the earliest life forms.
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Students have asked these similar questions
In what way was the evolution of eukaryotic cells linked to the increase in the oxygen concentration in the atmosphere that occurred during the Precambrian?
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Chapter 10 Solutions
Loose-leaf Version for What is Life? A Guide to Biology 3e & LaunchPad for Phelan's What is Life? (Six Month Access) 3e
Ch. 10 - Prob. 1SACh. 10 - Prob. 2SACh. 10 - Prob. 3SACh. 10 - Prob. 4SACh. 10 - Prob. 5SACh. 10 - Prob. 6SACh. 10 - Prob. 7SACh. 10 - Prob. 8SACh. 10 - Prob. 9SACh. 10 - Prob. 10SA
Ch. 10 - Prob. 11SACh. 10 - Prob. 12SACh. 10 - Prob. 13SACh. 10 - Prob. 14SACh. 10 - Prob. 15SACh. 10 - Prob. 16SACh. 10 - Prob. 17SACh. 10 - Prob. 1MCCh. 10 - Prob. 2MCCh. 10 - Prob. 3MCCh. 10 - Prob. 4MCCh. 10 - Prob. 5MCCh. 10 - Prob. 6MCCh. 10 - Prob. 7MCCh. 10 - Prob. 8MCCh. 10 - Prob. 9MCCh. 10 - Prob. 10MCCh. 10 - Prob. 11MCCh. 10 - Prob. 12MCCh. 10 - Prob. 13MCCh. 10 - Prob. 14MCCh. 10 - Prob. 15MCCh. 10 - Prob. 16MCCh. 10 - Prob. 17MC
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- Which event in Earth’s historyeventually lead to the evolution of multicellular lifeforms?arrow_forwardHow would the appearance of protocells have represented a key step in the origin of life?arrow_forwardBelow are some key events that took place during the long history of life on Earth. Arrange them in the correct sequence: First land plants (kingdom Plantae) First eukaryotic life (domain Eukarya) Adaptive radiation of mammals (class Mammalia) Evolution of chloroplasts Cambrian explosion First aerobic organisms (those that utilize cellular respiration) First land vertebrates (tetrapods) First multicellular organisms First living cellsarrow_forward
- There was a large proliferation of fossils showing increase in diversity of life.What period is this?arrow_forwardHas the number of species on Earth increased steadily since the origin of life?arrow_forwardAn organism dies,and its body leaves an impression in mud. Over time, the mud hardens into rock, and the impression becomes a fossil. Which kind of fossil was formed? A) cast B) mold C) original material D) trace fossilarrow_forward
- What is the study of fossils called? Mention any three points how the fossils throw light on past life?arrow_forwardMost likely the proto-cells were little more than membrane sacs protecting information-storing template and various metabolic agents from the environment. Which probable stage of physical and chemical evolution of life is that?arrow_forwardThe formation of the first living organism is still a mystery. Outline and explain the steps in the origin of life. Explain where the original organisms must have lived and why?arrow_forward
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