Almost all of the oxygen gas in today’s atmosphere is present as a result of a. outgassing from volcanoes. b. aerobic respiration. c. endosymbiosis. d. photosynthesis.

Question

Want to see more full solutions like this?

Answer 1

Textbook Question

Chapter 18, Problem 1MC

Almost all of the oxygen gas in today’s atmosphere is present as a result of

a. outgassing from volcanoes.
b. aerobic respiration.
c. endosymbiosis.
d. photosynthesis.

Expert Solution & Answer

Summary Introduction

Introduction:

There was no oxygen gas in the primitive atmosphere, so the cells must have metabolized the organic molecules anaerobically. Thus, anerobic bacteria were the earliest cells. Simpler molecules such as water, and carbon dioxide would still be very abundant. Eventually, some cells evolved the ability to utilize the energy of sunlight to carry out the synthesis of high energy complex molecules from simpler molecules releasing oxygen as a byproduct. The emergence of this new method introduced significant amount of oxygen into the atmosphere for the first time.

Answer to Problem 1MC

Correct answer:

Almost all of the oxygen gas in today’s atmosphere is present as a result of photosynthesis. Therefore, option (d) is correct.

Option (d) is given as “photosynthesis”.

Explanation of Solution

Justify reason for the correct statement:

Water based photosynthesis converts carbon dioxide and water to energy-containing molecules of glucose which releases oxygen as a byproduct. This oxygen denotes the significant amount of free oxygen present in the today’s atmosphere.

Hence, option (d) is correct.

Justify reasons for the incorrect statements:

Option (a) is given as “outgassing from volcanoes”.

Outgassing from volcanoes produces hydrogen sulfide. Hence, it is a wrong answer.

Option (b) is given as “aerobic respiration”.

It is utilization of oxygen to break down the food molecules for the release of energy. Thus, this process utilizes and decreases the amount of oxygen in the atmosphere. Hence, it is a wrong answer.

Option (c) is given as “endosymbiosis”

The theory of endosymbiosis proposes the origin of eukaryotic organelles such as chloroplast and mitochondria. Hence, it is a wrong answer.

Hence, options (a), (b), and (c) are incorrect.

Conclusion

Majority of oxygen available in the today’s atmosphere is present as a result of photosynthesis.

Want to see more full solutions like this?

Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!

Students have asked these similar questions

1. Color the line that represents all ancestors of the Eastern white pine tree green (but only the ancestral line NOT shared with other organisms) 2. Oncle the last common ancestor of the Colorado blue spruce tree and Eastern white pine tree. 3. Put a box around the last common ancestor of the sugar maple tree and the dogwood tree. 4. Put a triangle around the last common ancestor of the red pine tree and the american holly bush. 5. Color the line that represents all ancestors of the Ponderosa pine tree red (including all shared ancestors). 6. Color the line that represents all ancestors of the American elm tree blue (including all shared ancestors). 7 Color the line that represents all ancestors of the Sabal palm tree purple (including all shared ancestors) 8. Using a yellow highlighter or colored pencil, circle the clade that includes all pine trees. 9. Using a orange highlighter or colored pencil, circle the clade that includes all gymnosperms 10. Can you tell…

You have been hired as a public relations specialist to give invertebrates a good name. After all, they are much more than just creepy crawly bugs! Your first task though is to convince yourself that is true. The best way to do that is to start close to home. Find something in your house that is a product obtained directly from an invertebrate or only due to an invertebrate’s actions. Describe the product, its function and utility, as well as any human manufactured alternatives. Be sure to highlight the advantages of obtaining this directly from nature. Keep in mind, a product can be something you use, wear, eat, or enjoy for its visual appeal.

Use the following tree diagram to answer Questions #8-10. 8) Which of the following two animals are the most closely related based on the tree to the left? a) Pig and camel b) Hippo and pig c) Deer and cow 9) CIRCLE on the tree diagram where the common ancestor between a hippo and a cow is. 10) Put a SQUARE on the tree diagram where the common ancestor between a pig and a peccary is.

Answer 2

Textbook Question

Chapter 18, Problem 1MC

Almost all of the oxygen gas in today’s atmosphere is present as a result of

a. outgassing from volcanoes.
b. aerobic respiration.
c. endosymbiosis.
d. photosynthesis.

Expert Solution & Answer

Summary Introduction

Introduction:

There was no oxygen gas in the primitive atmosphere, so the cells must have metabolized the organic molecules anaerobically. Thus, anerobic bacteria were the earliest cells. Simpler molecules such as water, and carbon dioxide would still be very abundant. Eventually, some cells evolved the ability to utilize the energy of sunlight to carry out the synthesis of high energy complex molecules from simpler molecules releasing oxygen as a byproduct. The emergence of this new method introduced significant amount of oxygen into the atmosphere for the first time.

Answer to Problem 1MC

Correct answer:

Almost all of the oxygen gas in today’s atmosphere is present as a result of photosynthesis. Therefore, option (d) is correct.

Option (d) is given as “photosynthesis”.

Explanation of Solution

Justify reason for the correct statement:

Water based photosynthesis converts carbon dioxide and water to energy-containing molecules of glucose which releases oxygen as a byproduct. This oxygen denotes the significant amount of free oxygen present in the today’s atmosphere.

Hence, option (d) is correct.

Justify reasons for the incorrect statements:

Option (a) is given as “outgassing from volcanoes”.

Outgassing from volcanoes produces hydrogen sulfide. Hence, it is a wrong answer.

Option (b) is given as “aerobic respiration”.

It is utilization of oxygen to break down the food molecules for the release of energy. Thus, this process utilizes and decreases the amount of oxygen in the atmosphere. Hence, it is a wrong answer.

Option (c) is given as “endosymbiosis”

The theory of endosymbiosis proposes the origin of eukaryotic organelles such as chloroplast and mitochondria. Hence, it is a wrong answer.

Hence, options (a), (b), and (c) are incorrect.

Conclusion

Majority of oxygen available in the today’s atmosphere is present as a result of photosynthesis.

Want to see more full solutions like this?

Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!

Answer 3

Textbook Question

Chapter 18, Problem 1MC

Almost all of the oxygen gas in today’s atmosphere is present as a result of

a. outgassing from volcanoes.
b. aerobic respiration.
c. endosymbiosis.
d. photosynthesis.

Expert Solution & Answer

Summary Introduction

Introduction:

There was no oxygen gas in the primitive atmosphere, so the cells must have metabolized the organic molecules anaerobically. Thus, anerobic bacteria were the earliest cells. Simpler molecules such as water, and carbon dioxide would still be very abundant. Eventually, some cells evolved the ability to utilize the energy of sunlight to carry out the synthesis of high energy complex molecules from simpler molecules releasing oxygen as a byproduct. The emergence of this new method introduced significant amount of oxygen into the atmosphere for the first time.

Answer to Problem 1MC

Correct answer:

Almost all of the oxygen gas in today’s atmosphere is present as a result of photosynthesis. Therefore, option (d) is correct.

Option (d) is given as “photosynthesis”.

Explanation of Solution

Justify reason for the correct statement:

Water based photosynthesis converts carbon dioxide and water to energy-containing molecules of glucose which releases oxygen as a byproduct. This oxygen denotes the significant amount of free oxygen present in the today’s atmosphere.

Hence, option (d) is correct.

Justify reasons for the incorrect statements:

Option (a) is given as “outgassing from volcanoes”.

Outgassing from volcanoes produces hydrogen sulfide. Hence, it is a wrong answer.

Option (b) is given as “aerobic respiration”.

It is utilization of oxygen to break down the food molecules for the release of energy. Thus, this process utilizes and decreases the amount of oxygen in the atmosphere. Hence, it is a wrong answer.

Option (c) is given as “endosymbiosis”

The theory of endosymbiosis proposes the origin of eukaryotic organelles such as chloroplast and mitochondria. Hence, it is a wrong answer.

Hence, options (a), (b), and (c) are incorrect.

Conclusion

Majority of oxygen available in the today’s atmosphere is present as a result of photosynthesis.

Want to see more full solutions like this?

Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!

Answer 4

Textbook Question

Chapter 18, Problem 1MC

Almost all of the oxygen gas in today’s atmosphere is present as a result of

a. outgassing from volcanoes.
b. aerobic respiration.
c. endosymbiosis.
d. photosynthesis.

Expert Solution & Answer

Summary Introduction

Introduction:

There was no oxygen gas in the primitive atmosphere, so the cells must have metabolized the organic molecules anaerobically. Thus, anerobic bacteria were the earliest cells. Simpler molecules such as water, and carbon dioxide would still be very abundant. Eventually, some cells evolved the ability to utilize the energy of sunlight to carry out the synthesis of high energy complex molecules from simpler molecules releasing oxygen as a byproduct. The emergence of this new method introduced significant amount of oxygen into the atmosphere for the first time.

Answer to Problem 1MC

Correct answer:

Almost all of the oxygen gas in today’s atmosphere is present as a result of photosynthesis. Therefore, option (d) is correct.

Option (d) is given as “photosynthesis”.

Explanation of Solution

Justify reason for the correct statement:

Water based photosynthesis converts carbon dioxide and water to energy-containing molecules of glucose which releases oxygen as a byproduct. This oxygen denotes the significant amount of free oxygen present in the today’s atmosphere.

Hence, option (d) is correct.

Justify reasons for the incorrect statements:

Option (a) is given as “outgassing from volcanoes”.

Outgassing from volcanoes produces hydrogen sulfide. Hence, it is a wrong answer.

Option (b) is given as “aerobic respiration”.

It is utilization of oxygen to break down the food molecules for the release of energy. Thus, this process utilizes and decreases the amount of oxygen in the atmosphere. Hence, it is a wrong answer.

Option (c) is given as “endosymbiosis”

The theory of endosymbiosis proposes the origin of eukaryotic organelles such as chloroplast and mitochondria. Hence, it is a wrong answer.

Hence, options (a), (b), and (c) are incorrect.

Conclusion

Majority of oxygen available in the today’s atmosphere is present as a result of photosynthesis.

Want to see more full solutions like this?

Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!

Answer 5

Textbook Question

Answer 6

Textbook Question

Answer 7

Expert Solution & Answer

Summary Introduction

Introduction:

There was no oxygen gas in the primitive atmosphere, so the cells must have metabolized the organic molecules anaerobically. Thus, anerobic bacteria were the earliest cells. Simpler molecules such as water, and carbon dioxide would still be very abundant. Eventually, some cells evolved the ability to utilize the energy of sunlight to carry out the synthesis of high energy complex molecules from simpler molecules releasing oxygen as a byproduct. The emergence of this new method introduced significant amount of oxygen into the atmosphere for the first time.

Answer to Problem 1MC

Correct answer:

Almost all of the oxygen gas in today’s atmosphere is present as a result of photosynthesis. Therefore, option (d) is correct.

Option (d) is given as “photosynthesis”.

Explanation of Solution

Justify reason for the correct statement:

Water based photosynthesis converts carbon dioxide and water to energy-containing molecules of glucose which releases oxygen as a byproduct. This oxygen denotes the significant amount of free oxygen present in the today’s atmosphere.

Hence, option (d) is correct.

Justify reasons for the incorrect statements:

Option (a) is given as “outgassing from volcanoes”.

Outgassing from volcanoes produces hydrogen sulfide. Hence, it is a wrong answer.

Option (b) is given as “aerobic respiration”.

It is utilization of oxygen to break down the food molecules for the release of energy. Thus, this process utilizes and decreases the amount of oxygen in the atmosphere. Hence, it is a wrong answer.

Option (c) is given as “endosymbiosis”

The theory of endosymbiosis proposes the origin of eukaryotic organelles such as chloroplast and mitochondria. Hence, it is a wrong answer.

Hence, options (a), (b), and (c) are incorrect.

Conclusion

Majority of oxygen available in the today’s atmosphere is present as a result of photosynthesis.

Answer 8

Expert Solution & Answer

Summary Introduction

Introduction:

There was no oxygen gas in the primitive atmosphere, so the cells must have metabolized the organic molecules anaerobically. Thus, anerobic bacteria were the earliest cells. Simpler molecules such as water, and carbon dioxide would still be very abundant. Eventually, some cells evolved the ability to utilize the energy of sunlight to carry out the synthesis of high energy complex molecules from simpler molecules releasing oxygen as a byproduct. The emergence of this new method introduced significant amount of oxygen into the atmosphere for the first time.

Answer to Problem 1MC

Correct answer:

Almost all of the oxygen gas in today’s atmosphere is present as a result of photosynthesis. Therefore, option (d) is correct.

Option (d) is given as “photosynthesis”.

Explanation of Solution

Justify reason for the correct statement:

Water based photosynthesis converts carbon dioxide and water to energy-containing molecules of glucose which releases oxygen as a byproduct. This oxygen denotes the significant amount of free oxygen present in the today’s atmosphere.

Hence, option (d) is correct.

Justify reasons for the incorrect statements:

Option (a) is given as “outgassing from volcanoes”.

Outgassing from volcanoes produces hydrogen sulfide. Hence, it is a wrong answer.

Option (b) is given as “aerobic respiration”.

It is utilization of oxygen to break down the food molecules for the release of energy. Thus, this process utilizes and decreases the amount of oxygen in the atmosphere. Hence, it is a wrong answer.

Option (c) is given as “endosymbiosis”

The theory of endosymbiosis proposes the origin of eukaryotic organelles such as chloroplast and mitochondria. Hence, it is a wrong answer.

Hence, options (a), (b), and (c) are incorrect.

Conclusion

Majority of oxygen available in the today’s atmosphere is present as a result of photosynthesis.

Answer 9

Expert Solution & Answer

Answer 10

Expert Solution & Answer

Answer 11

Summary Introduction

Introduction:

There was no oxygen gas in the primitive atmosphere, so the cells must have metabolized the organic molecules anaerobically. Thus, anerobic bacteria were the earliest cells. Simpler molecules such as water, and carbon dioxide would still be very abundant. Eventually, some cells evolved the ability to utilize the energy of sunlight to carry out the synthesis of high energy complex molecules from simpler molecules releasing oxygen as a byproduct. The emergence of this new method introduced significant amount of oxygen into the atmosphere for the first time.

Answer 12

Answer to Problem 1MC

Correct answer:

Almost all of the oxygen gas in today’s atmosphere is present as a result of photosynthesis. Therefore, option (d) is correct.

Option (d) is given as “photosynthesis”.

Answer 13

Explanation of Solution

Justify reason for the correct statement:

Water based photosynthesis converts carbon dioxide and water to energy-containing molecules of glucose which releases oxygen as a byproduct. This oxygen denotes the significant amount of free oxygen present in the today’s atmosphere.

Hence, option (d) is correct.

Justify reasons for the incorrect statements:

Option (a) is given as “outgassing from volcanoes”.

Outgassing from volcanoes produces hydrogen sulfide. Hence, it is a wrong answer.

Option (b) is given as “aerobic respiration”.

It is utilization of oxygen to break down the food molecules for the release of energy. Thus, this process utilizes and decreases the amount of oxygen in the atmosphere. Hence, it is a wrong answer.

Option (c) is given as “endosymbiosis”

The theory of endosymbiosis proposes the origin of eukaryotic organelles such as chloroplast and mitochondria. Hence, it is a wrong answer.

Hence, options (a), (b), and (c) are incorrect.

Answer 14

Conclusion

Majority of oxygen available in the today’s atmosphere is present as a result of photosynthesis.

Answer 15

Ch. 18.1 - How Would the experiments result charge if oxygen...Ch. 18.1 - describe a likely scenario for the origin of life?Ch. 18.1 - describe, for each step in the scenario, some...Ch. 18.2 - Uranium-235, with a half-life of 713 million...Ch. 18.2 - Scientists have identified a free living bacterium...Ch. 18.2 - describe scenarios for the major evolutionary...Ch. 18.2 - State the order in which these events occurred,...Ch. 18.3 - describe fossil evidence of the earliest...Ch. 18.3 - describe the advantages that fostered the origin...Ch. 18.3 - Prob. 3CYL

Almost all of the oxygen gas in today’s atmosphere is present as a result of a. outgassing from volcanoes. b. aerobic respiration. c. endosymbiosis. d. photosynthesis.

Solution Summary: The author explains that anerobic bacteria metabolized organic molecules anaerobically, thereby introducing oxygen into the atmosphere for the first time.

Concept explainers

Videos

Answer to Problem 1MC

Explanation of Solution

Want to see more full solutions like this?

Chapter 18 Solutions