Biology
5th Edition
ISBN: 9781260487947
Author: BROOKER
Publisher: MCG
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Textbook Question
Chapter 26, Problem 1COQ
Discuss the factors that have contributed to the dramatic changes in life-forms since the origin of life on Earth about 3.5 to 4 billion years ago.
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List several significant events in the history of life on earth that are associated with the K-T Boundary.
https://youtu.be/SkeNMoDlHUU?si=AwIDdGlbpS69KBVe
(Summarize it in a bullet form and send the answer here based on the given questions)
Here are the following questions:
1. Discuss the major events in the history of life on earth, starting from the origin of life up to the present day, highlighting key evolutionary developments and transitions.
2. What is the role of mass extinctions in shaping the history of life on Earth? How do these events influenced biodiversity and evolutionary trajectories?
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Based on the given figure, answer the
following questions
(Note: BYA=Billion Years ago; MYA= Million
years ago)
The oldest eukaryote might be dated back to?
Each day represents how many years?
When did the first prokaryotic fossil exist?
When did photosynthesis first emerged?
The multicellular organisms appeared?
~1.5 BYA ~2.5 BYA ~10 BYA
~3.5 BYA
~150 MY
~50 MY
~1 MY
~4.5 MYA ~ 10 MYA
~1 BYA
Chapter 26 Solutions
Biology
Ch. 26.1 - Prob. 1CCCh. 26.1 - Prob. 2CCCh. 26.2 - Prob. 1CSCh. 26.2 - Prob. 1CCCh. 26.2 - Prob. 2CSCh. 26.3 - What are the defining features of primates?Ch. 26.3 - Core Skill: Modeling The goal of this modeling...Ch. 26 - Prob. 1TYCh. 26 - Prob. 2TYCh. 26 - Prob. 3TY
Ch. 26 - The endosymbiosis hypothesis explaining the...Ch. 26 - Prob. 5TYCh. 26 - Which of the following explanations of...Ch. 26 - Prob. 7TYCh. 26 - Prob. 8TYCh. 26 - Prob. 9TYCh. 26 - Which of the following statements regarding modern...Ch. 26 - Prob. 1CQCh. 26 - Prob. 2CQCh. 26 - Core Concept: Evolution Describe two examples in...Ch. 26 - Discuss the factors that have contributed to the...Ch. 26 - Discuss how the human body has changed since the...
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- the landmark experiment by Miller and Urey, and various repeats of this experiment, did not successfully recreate life itself, but why do we consider the results from this experiment as support for the origin of life on Earth?arrow_forwardThe period of the history of the earth that is referred to as Chemical Evolution was essential for the appearance of life as we know it. This theory asserts that Chemical Evolution is a) confirmed by laboratory experiments, b) occurred without the presence of any living organisms, c) created the conditions needed for primitive life, d) occurred because of the properties of elements and the compounds that they formed. e) All are assertions of this theory.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
- 9) Rocks containing fossil evidence have been found in Canada suggesting how life on Earth evolved. What about the rocks led to this belief? A) They contained graphite, a from of pure carbon. B) They contained fossil evidence of human remains. C) They were metamorphic rocks with traces of water. D) They were extrusive rocks that came from the volcanic vents. Not Gradedarrow_forwardChronologically arrange the evolutionary events of life’s origin on earth with 1 being the earliest and 10 the most recent.arrow_forwardWhich molecule -DNA or RNA- do scientist believe was found in the first life form on Earth? Why do scientist believe this molecule was first to form life?arrow_forward
- Describe how the sudden appearance of oxygen in the atmosphere about 2.5 billion years ago influenced the development of modern life-forms.arrow_forwardAre the three methods/hypotheses of producing the building blocks of life on earth mutually exclusive? Why or why not? Is there evidence that supports all three proposed mechanismsarrow_forwardScientists Stanley Miller and Harold Urey set up an experiment modeling the environmental conditions thought to exist during the early stages of Earth's formation. The setup of Miller and Urey's experiment is shown below. Which conclusion about the origin of life could be drawn from the potential results of this experiment? Life assembled from chemical building blocks. Life began when water vapor became electrified. Life evolved from the DNA of simple unicellular organisms. Life began when salt water caused a mutation in an ancient virus.arrow_forward
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