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:SCIENCE OF BIOL.(LL) >CUSTOM<, 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

A sample of blood was taken from the above individual and prepared for haemoglobin analysis. However, when water was added the cells did not lyse and looked normal in size and shape. The technician suspected that they had may have made an error in the protocol – what is the most likely explanation? The cell membranes are more resistant than normal. An isotonic solution had been added instead of water. A solution of 0.1 M NaCl had been added instead of water. Not enough water had been added to the red blood cell pellet. The man had sickle-cell anaemia.

With reference to their absorption spectra of the oxy haemoglobin intact line) and deoxyhemoglobin (broken line) shown in Figure 2 below, how would you best explain the reason why there are differences in the major peaks of the spectra? Figure 2. SPECTRA OF OXYGENATED AND DEOXYGENATED HAEMOGLOBIN OBTAINED WITH THE RECORDING SPECTROPHOTOMETER 1.4 Abs < 0.8 06 0.4 400 420 440 460 480 500 520 540 560 580 600 nm 1. The difference in the spectra is due to a pH change in the deoxy-haemoglobin due to uptake of CO2- 2. There is more oxygen-carrying plasma in the oxy-haemoglobin sample. 3. The change in Mr due to oxygen binding causes the oxy haemoglobin to have a higher absorbance peak. 4. Oxy-haemoglobin is contaminated by carbaminohemoglobin, and therefore has a higher absorbance peak 5. Oxy-haemoglobin absorbs more light of blue wavelengths and less of red wavelengths than deoxy-haemoglobin

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:SCIENCE OF BIOL.(LL) >CUSTOM<, 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:SCIENCE OF BIOL.(LL) >CUSTOM<, 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:SCIENCE OF BIOL.(LL) >CUSTOM<, 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:SCIENCE OF BIOL.(LL) >CUSTOM<, 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:SCIENCE OF BIOL.(LL) >CUSTOM<, 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:SCIENCE OF BIOL.(LL) >CUSTOM<, 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