What is Life? A Guide to Biology
3rd Edition
ISBN: 9781464135958
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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Chapter 10 Solutions
What is Life? A Guide to Biology
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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- How 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_forwardThere was a large proliferation of fossils showing increase in diversity of life.What period is this?arrow_forward
- What is fossil?arrow_forwardWhen we consider the major forms of life on Earth in Figure 1.6, what are the characteristics that connect the various types of organisms in a given group and suggest that they share a common ancestor?arrow_forwardHow did the researchers use the DNA of living sponges to make conclusions about events occurring hundreds of millions of years ago?arrow_forward
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