The represented data are given in the graph and the purpose of reverse development in some cnidarians. Introduction: Cnidarians are marine, invertebrate, and radially symmetrical animals that belong to phylum Cnidaria. These animals do not have a complete gut instead have a blind sac called the gastrovascular cavity, which is connected to the single opening called the mouth. The cnidarians exhibit two distinct stages during its life cycle.

Question

Want to see more full solutions like this?

Answer 1

Question

Chapter 30, Problem 1Q

Summary Introduction

To review:

The represented data are given in the graph and the purpose of reverse development in some cnidarians.

Introduction:

Cnidarians are marine, invertebrate, and radially symmetrical animals that belong to phylum Cnidaria. These animals do not have a complete gut instead have a blind sac called the gastrovascular cavity, which is connected to the single opening called the mouth. The cnidarians exhibit two distinct stages during its life cycle.

Expert Solution & Answer

Explanation of Solution

The life cycle of all cnidarians involves the formation of two distinct body forms: one sessile (immobile) and other motile. The sessile stage is known as the polyp, which is cylindrical in structure and is attached to a substratum, while the motile stage is known as the medusa, which is umbrella or bell shaped and is free swimming in the sea. The polyp stage exhibits the asexual young stage that converts into the medusa stage representing the sexual mature phase of the organism.

Some cnidarians such as Turritopsis dohrnii shows the reversal of sexual mature phase into young asexual phase. This reversal process is referred to as the reduction. The medusa stage under reduction into its younger version is called as the reducing medusa. Such cnidarians are regarded as “immortal jellies.” Research has shown that this revert back process occurs when the organism faces stress conditions in its surrounding such as unavailability of food, injury, and unfavorable conditions to sexually reproduce.

The following graph represents the data generated when the Turritopsis dohrnii species were incubated under different concentrations of cesium chloride (CsCl) for 3 hours, as a part of a study of reversion phenomenon shown by this species.

Life: The Science of Biology, Chapter 30, Problem 1Q

From the graph, it is clear that at CsCl concentration of 14.5 mM (low), maximum number of reducing medusa stages were recovered as compared to the control where no stress is given and maximum number of normal medusa stages were seen. At intermediate CsCl concentrations (29 Mm and 58 mM), equal number of reducing medusa stages and polyp stages were seen. However, at very high CsCl concentration (116 mM), absence of reducing medusa was seen while maximum number of polyp stages were recovered. This represents the reversion of all the medusa stages into the polyp stage.

Conclusion

Therefore, it can be concluded that as the stress conditions increase in the environment of cnidaria, the revert back phenomenon is more as more number of medusa stages starts reverting back to the young polyp stages. This reversion process contributes to the immortality of these animals.

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

Analyze the effectiveness of the a drug treatment program based on the needs of 18-65 year olds who are in need of treatment by critically describing 4 things in the program is doing effectively and 4 things the program needs some improvement.

I have the first half finished... just need the bottom half.

13. Practice Calculations: 3 colonies were suspended in the following dilution series and then a viable plate count and microscope count was performed. Calculate IDF's, TDF's and then calculate the CFU/mL in each tube by both methods. Finally calculate the cells in 1 colony by both methods. Show all of your calculations in the space provided on the following pages. 3 colonies 56 cells 10 μL 10 μL 100 μL 500 με m OS A B D 5.0 mL 990 με 990 με 900 με 500 μL EN 2 100 με 100 μL 118 colonies 12 colonies

Answer 2

Question

Chapter 30, Problem 1Q

Summary Introduction

To review:

The represented data are given in the graph and the purpose of reverse development in some cnidarians.

Introduction:

Cnidarians are marine, invertebrate, and radially symmetrical animals that belong to phylum Cnidaria. These animals do not have a complete gut instead have a blind sac called the gastrovascular cavity, which is connected to the single opening called the mouth. The cnidarians exhibit two distinct stages during its life cycle.

Expert Solution & Answer

Explanation of Solution

The life cycle of all cnidarians involves the formation of two distinct body forms: one sessile (immobile) and other motile. The sessile stage is known as the polyp, which is cylindrical in structure and is attached to a substratum, while the motile stage is known as the medusa, which is umbrella or bell shaped and is free swimming in the sea. The polyp stage exhibits the asexual young stage that converts into the medusa stage representing the sexual mature phase of the organism.

Some cnidarians such as Turritopsis dohrnii shows the reversal of sexual mature phase into young asexual phase. This reversal process is referred to as the reduction. The medusa stage under reduction into its younger version is called as the reducing medusa. Such cnidarians are regarded as “immortal jellies.” Research has shown that this revert back process occurs when the organism faces stress conditions in its surrounding such as unavailability of food, injury, and unfavorable conditions to sexually reproduce.

The following graph represents the data generated when the Turritopsis dohrnii species were incubated under different concentrations of cesium chloride (CsCl) for 3 hours, as a part of a study of reversion phenomenon shown by this species.

Life: The Science of Biology, Chapter 30, Problem 1Q

From the graph, it is clear that at CsCl concentration of 14.5 mM (low), maximum number of reducing medusa stages were recovered as compared to the control where no stress is given and maximum number of normal medusa stages were seen. At intermediate CsCl concentrations (29 Mm and 58 mM), equal number of reducing medusa stages and polyp stages were seen. However, at very high CsCl concentration (116 mM), absence of reducing medusa was seen while maximum number of polyp stages were recovered. This represents the reversion of all the medusa stages into the polyp stage.

Conclusion

Therefore, it can be concluded that as the stress conditions increase in the environment of cnidaria, the revert back phenomenon is more as more number of medusa stages starts reverting back to the young polyp stages. This reversion process contributes to the immortality of these animals.

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

Question

Chapter 30, Problem 1Q

Summary Introduction

To review:

The represented data are given in the graph and the purpose of reverse development in some cnidarians.

Introduction:

Cnidarians are marine, invertebrate, and radially symmetrical animals that belong to phylum Cnidaria. These animals do not have a complete gut instead have a blind sac called the gastrovascular cavity, which is connected to the single opening called the mouth. The cnidarians exhibit two distinct stages during its life cycle.

Expert Solution & Answer

Explanation of Solution

The life cycle of all cnidarians involves the formation of two distinct body forms: one sessile (immobile) and other motile. The sessile stage is known as the polyp, which is cylindrical in structure and is attached to a substratum, while the motile stage is known as the medusa, which is umbrella or bell shaped and is free swimming in the sea. The polyp stage exhibits the asexual young stage that converts into the medusa stage representing the sexual mature phase of the organism.

Some cnidarians such as Turritopsis dohrnii shows the reversal of sexual mature phase into young asexual phase. This reversal process is referred to as the reduction. The medusa stage under reduction into its younger version is called as the reducing medusa. Such cnidarians are regarded as “immortal jellies.” Research has shown that this revert back process occurs when the organism faces stress conditions in its surrounding such as unavailability of food, injury, and unfavorable conditions to sexually reproduce.

The following graph represents the data generated when the Turritopsis dohrnii species were incubated under different concentrations of cesium chloride (CsCl) for 3 hours, as a part of a study of reversion phenomenon shown by this species.

Life: The Science of Biology, Chapter 30, Problem 1Q

From the graph, it is clear that at CsCl concentration of 14.5 mM (low), maximum number of reducing medusa stages were recovered as compared to the control where no stress is given and maximum number of normal medusa stages were seen. At intermediate CsCl concentrations (29 Mm and 58 mM), equal number of reducing medusa stages and polyp stages were seen. However, at very high CsCl concentration (116 mM), absence of reducing medusa was seen while maximum number of polyp stages were recovered. This represents the reversion of all the medusa stages into the polyp stage.

Conclusion

Therefore, it can be concluded that as the stress conditions increase in the environment of cnidaria, the revert back phenomenon is more as more number of medusa stages starts reverting back to the young polyp stages. This reversion process contributes to the immortality of these animals.

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

Question

Chapter 30, Problem 1Q

Summary Introduction

To review:

The represented data are given in the graph and the purpose of reverse development in some cnidarians.

Introduction:

Cnidarians are marine, invertebrate, and radially symmetrical animals that belong to phylum Cnidaria. These animals do not have a complete gut instead have a blind sac called the gastrovascular cavity, which is connected to the single opening called the mouth. The cnidarians exhibit two distinct stages during its life cycle.

Expert Solution & Answer

Explanation of Solution

The life cycle of all cnidarians involves the formation of two distinct body forms: one sessile (immobile) and other motile. The sessile stage is known as the polyp, which is cylindrical in structure and is attached to a substratum, while the motile stage is known as the medusa, which is umbrella or bell shaped and is free swimming in the sea. The polyp stage exhibits the asexual young stage that converts into the medusa stage representing the sexual mature phase of the organism.

Some cnidarians such as Turritopsis dohrnii shows the reversal of sexual mature phase into young asexual phase. This reversal process is referred to as the reduction. The medusa stage under reduction into its younger version is called as the reducing medusa. Such cnidarians are regarded as “immortal jellies.” Research has shown that this revert back process occurs when the organism faces stress conditions in its surrounding such as unavailability of food, injury, and unfavorable conditions to sexually reproduce.

The following graph represents the data generated when the Turritopsis dohrnii species were incubated under different concentrations of cesium chloride (CsCl) for 3 hours, as a part of a study of reversion phenomenon shown by this species.

Life: The Science of Biology, Chapter 30, Problem 1Q

From the graph, it is clear that at CsCl concentration of 14.5 mM (low), maximum number of reducing medusa stages were recovered as compared to the control where no stress is given and maximum number of normal medusa stages were seen. At intermediate CsCl concentrations (29 Mm and 58 mM), equal number of reducing medusa stages and polyp stages were seen. However, at very high CsCl concentration (116 mM), absence of reducing medusa was seen while maximum number of polyp stages were recovered. This represents the reversion of all the medusa stages into the polyp stage.

Conclusion

Therefore, it can be concluded that as the stress conditions increase in the environment of cnidaria, the revert back phenomenon is more as more number of medusa stages starts reverting back to the young polyp stages. This reversion process contributes to the immortality of these animals.

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

Chapter 30, Problem 1Q

Summary Introduction

To review:

The represented data are given in the graph and the purpose of reverse development in some cnidarians.

Introduction:

Cnidarians are marine, invertebrate, and radially symmetrical animals that belong to phylum Cnidaria. These animals do not have a complete gut instead have a blind sac called the gastrovascular cavity, which is connected to the single opening called the mouth. The cnidarians exhibit two distinct stages during its life cycle.

Expert Solution & Answer

Explanation of Solution

The life cycle of all cnidarians involves the formation of two distinct body forms: one sessile (immobile) and other motile. The sessile stage is known as the polyp, which is cylindrical in structure and is attached to a substratum, while the motile stage is known as the medusa, which is umbrella or bell shaped and is free swimming in the sea. The polyp stage exhibits the asexual young stage that converts into the medusa stage representing the sexual mature phase of the organism.

Some cnidarians such as Turritopsis dohrnii shows the reversal of sexual mature phase into young asexual phase. This reversal process is referred to as the reduction. The medusa stage under reduction into its younger version is called as the reducing medusa. Such cnidarians are regarded as “immortal jellies.” Research has shown that this revert back process occurs when the organism faces stress conditions in its surrounding such as unavailability of food, injury, and unfavorable conditions to sexually reproduce.

The following graph represents the data generated when the Turritopsis dohrnii species were incubated under different concentrations of cesium chloride (CsCl) for 3 hours, as a part of a study of reversion phenomenon shown by this species.

Life: The Science of Biology, Chapter 30, Problem 1Q

From the graph, it is clear that at CsCl concentration of 14.5 mM (low), maximum number of reducing medusa stages were recovered as compared to the control where no stress is given and maximum number of normal medusa stages were seen. At intermediate CsCl concentrations (29 Mm and 58 mM), equal number of reducing medusa stages and polyp stages were seen. However, at very high CsCl concentration (116 mM), absence of reducing medusa was seen while maximum number of polyp stages were recovered. This represents the reversion of all the medusa stages into the polyp stage.

Conclusion

Therefore, it can be concluded that as the stress conditions increase in the environment of cnidaria, the revert back phenomenon is more as more number of medusa stages starts reverting back to the young polyp stages. This reversion process contributes to the immortality of these animals.

Answer 6

Chapter 30, Problem 1Q

Summary Introduction

To review:

The represented data are given in the graph and the purpose of reverse development in some cnidarians.

Introduction:

Cnidarians are marine, invertebrate, and radially symmetrical animals that belong to phylum Cnidaria. These animals do not have a complete gut instead have a blind sac called the gastrovascular cavity, which is connected to the single opening called the mouth. The cnidarians exhibit two distinct stages during its life cycle.

Expert Solution & Answer

Explanation of Solution

The life cycle of all cnidarians involves the formation of two distinct body forms: one sessile (immobile) and other motile. The sessile stage is known as the polyp, which is cylindrical in structure and is attached to a substratum, while the motile stage is known as the medusa, which is umbrella or bell shaped and is free swimming in the sea. The polyp stage exhibits the asexual young stage that converts into the medusa stage representing the sexual mature phase of the organism.

Some cnidarians such as Turritopsis dohrnii shows the reversal of sexual mature phase into young asexual phase. This reversal process is referred to as the reduction. The medusa stage under reduction into its younger version is called as the reducing medusa. Such cnidarians are regarded as “immortal jellies.” Research has shown that this revert back process occurs when the organism faces stress conditions in its surrounding such as unavailability of food, injury, and unfavorable conditions to sexually reproduce.

The following graph represents the data generated when the Turritopsis dohrnii species were incubated under different concentrations of cesium chloride (CsCl) for 3 hours, as a part of a study of reversion phenomenon shown by this species.

Life: The Science of Biology, Chapter 30, Problem 1Q

From the graph, it is clear that at CsCl concentration of 14.5 mM (low), maximum number of reducing medusa stages were recovered as compared to the control where no stress is given and maximum number of normal medusa stages were seen. At intermediate CsCl concentrations (29 Mm and 58 mM), equal number of reducing medusa stages and polyp stages were seen. However, at very high CsCl concentration (116 mM), absence of reducing medusa was seen while maximum number of polyp stages were recovered. This represents the reversion of all the medusa stages into the polyp stage.

Conclusion

Therefore, it can be concluded that as the stress conditions increase in the environment of cnidaria, the revert back phenomenon is more as more number of medusa stages starts reverting back to the young polyp stages. This reversion process contributes to the immortality of these animals.

Answer 7

Chapter 30, Problem 1Q

Summary Introduction

To review:

The represented data are given in the graph and the purpose of reverse development in some cnidarians.

Introduction:

Cnidarians are marine, invertebrate, and radially symmetrical animals that belong to phylum Cnidaria. These animals do not have a complete gut instead have a blind sac called the gastrovascular cavity, which is connected to the single opening called the mouth. The cnidarians exhibit two distinct stages during its life cycle.

Answer 8

Expert Solution & Answer

Explanation of Solution

The life cycle of all cnidarians involves the formation of two distinct body forms: one sessile (immobile) and other motile. The sessile stage is known as the polyp, which is cylindrical in structure and is attached to a substratum, while the motile stage is known as the medusa, which is umbrella or bell shaped and is free swimming in the sea. The polyp stage exhibits the asexual young stage that converts into the medusa stage representing the sexual mature phase of the organism.

Some cnidarians such as Turritopsis dohrnii shows the reversal of sexual mature phase into young asexual phase. This reversal process is referred to as the reduction. The medusa stage under reduction into its younger version is called as the reducing medusa. Such cnidarians are regarded as “immortal jellies.” Research has shown that this revert back process occurs when the organism faces stress conditions in its surrounding such as unavailability of food, injury, and unfavorable conditions to sexually reproduce.

The following graph represents the data generated when the Turritopsis dohrnii species were incubated under different concentrations of cesium chloride (CsCl) for 3 hours, as a part of a study of reversion phenomenon shown by this species.

Life: The Science of Biology, Chapter 30, Problem 1Q

From the graph, it is clear that at CsCl concentration of 14.5 mM (low), maximum number of reducing medusa stages were recovered as compared to the control where no stress is given and maximum number of normal medusa stages were seen. At intermediate CsCl concentrations (29 Mm and 58 mM), equal number of reducing medusa stages and polyp stages were seen. However, at very high CsCl concentration (116 mM), absence of reducing medusa was seen while maximum number of polyp stages were recovered. This represents the reversion of all the medusa stages into the polyp stage.

Answer 9

Expert Solution & Answer

Answer 10

Expert Solution & Answer

Answer 11

Conclusion

Therefore, it can be concluded that as the stress conditions increase in the environment of cnidaria, the revert back phenomenon is more as more number of medusa stages starts reverting back to the young polyp stages. This reversion process contributes to the immortality of these animals.

Answer 12

Ch. 30.1 - Prob. 1R Ch. 30.1 - Prob. 2R Ch. 30.2 - Prob. 1R Ch. 30.2 - Prob. 2R Ch. 30.3 - Prob. 1R Ch. 30.3 - Prob. 2R Ch. 30.4 - Prob. 1R Ch. 30.4 - Prob. 2R Ch. 30.5 - Prob. 1R Ch. 30.5 - Prob. 2R

Concept explainers

Videos

Explanation of Solution

Want to see more full solutions like this?

Chapter 30 Solutions