The time and the geological period when the last common ancestor of the seed plants as well as ferns lived. Given: The fFigure 1 shows the geological timescale of the origin of various embryophytes (land plants) including ferns and seed plants. Figure 1: The geological timescale of the origin of various embryophytes. Introduction: Horsetails, ferns, and seed plants form a clade commonly referred as euphyllophytes. These are the true leaf plants. Another important characteristic feature of these plants is overtopping. It is a growth pattern, where one branch of the plant gets differentiated from the other and grows beyond that other branch. This feature gives an advantage to the plants in competition for light.

Question

Want to see more full solutions like this?

Answer 1

Question

Chapter 27, Problem 1Q

Summary Introduction

To review:

The time and the geological period when the last common ancestor of the seed plants as well as ferns lived.

Given:

The fFigure 1 shows the geological timescale of the origin of various embryophytes (land plants) including ferns and seed plants.

Figure 1: The geological timescale of the origin of various embryophytes.

Introduction:

Horsetails, ferns, and seed plants form a clade commonly referred as euphyllophytes. These are the true leaf plants. Another important characteristic feature of these plants is overtopping. It is a growth pattern, where one branch of the plant gets differentiated from the other and grows beyond that other branch. This feature gives an advantage to the plants in competition for light.

Expert Solution & Answer

Explanation of Solution

It can be clearly observed from Figure 1 that the common ancestor of ferns as well as the seed plants originated about 390 million years ago in the mid-Devonian period of the Paleozoic era. Today, the ferns comprise of more than 12,000 species whereas there are about 15 known species of horsetails. The species of horsetails lie in a single genus, Equisetum. It can be noticed that horsetail species are more closely linked to ferns as compared to the seed plants.

Conclusion

Therefore, it can be concluded that common ancestor of ferns and seed plants arose in mid-Devonian about 390 million years ago.

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 27, Problem 1Q

Summary Introduction

To review:

The time and the geological period when the last common ancestor of the seed plants as well as ferns lived.

Given:

The fFigure 1 shows the geological timescale of the origin of various embryophytes (land plants) including ferns and seed plants.

Figure 1: The geological timescale of the origin of various embryophytes.

Introduction:

Horsetails, ferns, and seed plants form a clade commonly referred as euphyllophytes. These are the true leaf plants. Another important characteristic feature of these plants is overtopping. It is a growth pattern, where one branch of the plant gets differentiated from the other and grows beyond that other branch. This feature gives an advantage to the plants in competition for light.

Expert Solution & Answer

Explanation of Solution

It can be clearly observed from Figure 1 that the common ancestor of ferns as well as the seed plants originated about 390 million years ago in the mid-Devonian period of the Paleozoic era. Today, the ferns comprise of more than 12,000 species whereas there are about 15 known species of horsetails. The species of horsetails lie in a single genus, Equisetum. It can be noticed that horsetail species are more closely linked to ferns as compared to the seed plants.

Conclusion

Therefore, it can be concluded that common ancestor of ferns and seed plants arose in mid-Devonian about 390 million years ago.

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 27, Problem 1Q

Summary Introduction

To review:

The time and the geological period when the last common ancestor of the seed plants as well as ferns lived.

Given:

The fFigure 1 shows the geological timescale of the origin of various embryophytes (land plants) including ferns and seed plants.

Figure 1: The geological timescale of the origin of various embryophytes.

Introduction:

Horsetails, ferns, and seed plants form a clade commonly referred as euphyllophytes. These are the true leaf plants. Another important characteristic feature of these plants is overtopping. It is a growth pattern, where one branch of the plant gets differentiated from the other and grows beyond that other branch. This feature gives an advantage to the plants in competition for light.

Expert Solution & Answer

Explanation of Solution

It can be clearly observed from Figure 1 that the common ancestor of ferns as well as the seed plants originated about 390 million years ago in the mid-Devonian period of the Paleozoic era. Today, the ferns comprise of more than 12,000 species whereas there are about 15 known species of horsetails. The species of horsetails lie in a single genus, Equisetum. It can be noticed that horsetail species are more closely linked to ferns as compared to the seed plants.

Conclusion

Therefore, it can be concluded that common ancestor of ferns and seed plants arose in mid-Devonian about 390 million years ago.

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 27, Problem 1Q

Summary Introduction

To review:

The time and the geological period when the last common ancestor of the seed plants as well as ferns lived.

Given:

The fFigure 1 shows the geological timescale of the origin of various embryophytes (land plants) including ferns and seed plants.

Figure 1: The geological timescale of the origin of various embryophytes.

Introduction:

Horsetails, ferns, and seed plants form a clade commonly referred as euphyllophytes. These are the true leaf plants. Another important characteristic feature of these plants is overtopping. It is a growth pattern, where one branch of the plant gets differentiated from the other and grows beyond that other branch. This feature gives an advantage to the plants in competition for light.

Expert Solution & Answer

Explanation of Solution

It can be clearly observed from Figure 1 that the common ancestor of ferns as well as the seed plants originated about 390 million years ago in the mid-Devonian period of the Paleozoic era. Today, the ferns comprise of more than 12,000 species whereas there are about 15 known species of horsetails. The species of horsetails lie in a single genus, Equisetum. It can be noticed that horsetail species are more closely linked to ferns as compared to the seed plants.

Conclusion

Therefore, it can be concluded that common ancestor of ferns and seed plants arose in mid-Devonian about 390 million years ago.

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 27, Problem 1Q

Summary Introduction

To review:

The time and the geological period when the last common ancestor of the seed plants as well as ferns lived.

Given:

The fFigure 1 shows the geological timescale of the origin of various embryophytes (land plants) including ferns and seed plants.

Figure 1: The geological timescale of the origin of various embryophytes.

Introduction:

Horsetails, ferns, and seed plants form a clade commonly referred as euphyllophytes. These are the true leaf plants. Another important characteristic feature of these plants is overtopping. It is a growth pattern, where one branch of the plant gets differentiated from the other and grows beyond that other branch. This feature gives an advantage to the plants in competition for light.

Expert Solution & Answer

Explanation of Solution

It can be clearly observed from Figure 1 that the common ancestor of ferns as well as the seed plants originated about 390 million years ago in the mid-Devonian period of the Paleozoic era. Today, the ferns comprise of more than 12,000 species whereas there are about 15 known species of horsetails. The species of horsetails lie in a single genus, Equisetum. It can be noticed that horsetail species are more closely linked to ferns as compared to the seed plants.

Conclusion

Therefore, it can be concluded that common ancestor of ferns and seed plants arose in mid-Devonian about 390 million years ago.

Answer 6

Chapter 27, Problem 1Q

Summary Introduction

To review:

The time and the geological period when the last common ancestor of the seed plants as well as ferns lived.

Given:

The fFigure 1 shows the geological timescale of the origin of various embryophytes (land plants) including ferns and seed plants.

Figure 1: The geological timescale of the origin of various embryophytes.

Introduction:

Horsetails, ferns, and seed plants form a clade commonly referred as euphyllophytes. These are the true leaf plants. Another important characteristic feature of these plants is overtopping. It is a growth pattern, where one branch of the plant gets differentiated from the other and grows beyond that other branch. This feature gives an advantage to the plants in competition for light.

Expert Solution & Answer

Explanation of Solution

It can be clearly observed from Figure 1 that the common ancestor of ferns as well as the seed plants originated about 390 million years ago in the mid-Devonian period of the Paleozoic era. Today, the ferns comprise of more than 12,000 species whereas there are about 15 known species of horsetails. The species of horsetails lie in a single genus, Equisetum. It can be noticed that horsetail species are more closely linked to ferns as compared to the seed plants.

Conclusion

Therefore, it can be concluded that common ancestor of ferns and seed plants arose in mid-Devonian about 390 million years ago.

Answer 7

Chapter 27, Problem 1Q

Summary Introduction

To review:

The time and the geological period when the last common ancestor of the seed plants as well as ferns lived.

Given:

The fFigure 1 shows the geological timescale of the origin of various embryophytes (land plants) including ferns and seed plants.

Figure 1: The geological timescale of the origin of various embryophytes.

Introduction:

Horsetails, ferns, and seed plants form a clade commonly referred as euphyllophytes. These are the true leaf plants. Another important characteristic feature of these plants is overtopping. It is a growth pattern, where one branch of the plant gets differentiated from the other and grows beyond that other branch. This feature gives an advantage to the plants in competition for light.

Answer 8

Expert Solution & Answer

Explanation of Solution

It can be clearly observed from Figure 1 that the common ancestor of ferns as well as the seed plants originated about 390 million years ago in the mid-Devonian period of the Paleozoic era. Today, the ferns comprise of more than 12,000 species whereas there are about 15 known species of horsetails. The species of horsetails lie in a single genus, Equisetum. It can be noticed that horsetail species are more closely linked to ferns as compared to the seed plants.