The increased efficiency of cellular respiration and higher growth rates in organisms as result of the evolution of an oxygen-rich atmosphere. Introduction: The conditions on the earth were never as they are today. The atmosphere was once quite obnoxious with the reducing environment due to the presence of carbon dioxide. The organisms at that time survived using substrates other than oxygen for respiration. As a result, the growth rate was slow in the organisms with low oxygen present in atmosphere.

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Definition Definition Set of metabolic processes and reactions that produce energy from organic substances such as glucose. Cellular respiration takes place in the organism’s cells, where the chemical energy from nutrients or molecules of oxygen is converted into adenosine triphosphate (ATP). Cellular respiration that occurs in the presence of oxygen is called aerobic respiration; in the absence of oxygen, it is called anaerobic respiration.

Chapter 26, Problem 7TYU

Summary Introduction

To review:

The increased efficiency of cellular respiration and higher growth rates in organisms as result of the evolution of an oxygen-rich atmosphere.

Introduction:

The conditions on the earth were never as they are today. The atmosphere was once quite obnoxious with the reducing environment due to the presence of carbon dioxide. The organisms at that time survived using substrates other than oxygen for respiration. As a result, the growth rate was slow in the organisms with low oxygen present in atmosphere.

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For questions 30 through 36, select the location where the following events occur. Answers may be used once, more than once, or not at all. Some questions may have one answer, some questions may have more than one answer. a) mitochondrial inner membrane b) mitochondrial intermembrane space c) mitochondrial matrix d) thylakoid membrane e) thylakoid space 30. electron chain components embedded here 31. H+ pumped into here 32. found in plants 33. found in animals 34. ADP+ Pi→ ATP occurs here 35. ATP synthase embedded here 36. Light-capturing pigments embedded here asap please.

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A scientist discovered a new group of unicellular organisms that lack mitochondria but possess an organelle related to the endoplasmic reticulum and is involved in energy production. The scientist hypothesizes that this organelle might be a missing link in the evolution of mitochondria. A) Do you agree with this hypothesis? Explain. B) Based on the available evidence, what is the most likely hypothesis for the origin of mitochondria? Provide four pieces of evidence to support this theory and justify why they are valid.

Answer 2

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Definition Definition Set of metabolic processes and reactions that produce energy from organic substances such as glucose. Cellular respiration takes place in the organism’s cells, where the chemical energy from nutrients or molecules of oxygen is converted into adenosine triphosphate (ATP). Cellular respiration that occurs in the presence of oxygen is called aerobic respiration; in the absence of oxygen, it is called anaerobic respiration.

Chapter 26, Problem 7TYU

Summary Introduction

To review:

The increased efficiency of cellular respiration and higher growth rates in organisms as result of the evolution of an oxygen-rich atmosphere.

Introduction:

The conditions on the earth were never as they are today. The atmosphere was once quite obnoxious with the reducing environment due to the presence of carbon dioxide. The organisms at that time survived using substrates other than oxygen for respiration. As a result, the growth rate was slow in the organisms with low oxygen present in atmosphere.

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Answer 3

Question

Definition Definition Set of metabolic processes and reactions that produce energy from organic substances such as glucose. Cellular respiration takes place in the organism’s cells, where the chemical energy from nutrients or molecules of oxygen is converted into adenosine triphosphate (ATP). Cellular respiration that occurs in the presence of oxygen is called aerobic respiration; in the absence of oxygen, it is called anaerobic respiration.

Chapter 26, Problem 7TYU

Summary Introduction

To review:

The increased efficiency of cellular respiration and higher growth rates in organisms as result of the evolution of an oxygen-rich atmosphere.

Introduction:

The conditions on the earth were never as they are today. The atmosphere was once quite obnoxious with the reducing environment due to the presence of carbon dioxide. The organisms at that time survived using substrates other than oxygen for respiration. As a result, the growth rate was slow in the organisms with low oxygen present in atmosphere.

Expert Solution & Answer

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Check out a sample textbook solution

See solution

Answer 4

Question

Definition Definition Set of metabolic processes and reactions that produce energy from organic substances such as glucose. Cellular respiration takes place in the organism’s cells, where the chemical energy from nutrients or molecules of oxygen is converted into adenosine triphosphate (ATP). Cellular respiration that occurs in the presence of oxygen is called aerobic respiration; in the absence of oxygen, it is called anaerobic respiration.

Chapter 26, Problem 7TYU

Summary Introduction