What is a sieve-tube element? a. the sugar-conducting cell found in phloem b. the widened, perforation-containing, water-conducting cell found only in angiosperms c. the nutrient- and water-absorbing cell found in root hairs d. the nucleated and organelle-rich support cell found in phloem

Question

Want to see more full solutions like this?

Answer 1

Textbook Question

Chapter 34, Problem 1TYK

What is a sieve-tube element?

a. the sugar-conducting cell found in phloem

b. the widened, perforation-containing, water-conducting cell found only in angiosperms

c. the nutrient- and water-absorbing cell found in root hairs

d. the nucleated and organelle-rich support cell found in phloem

Expert Solution & Answer

Summary Introduction

Introduction:

The plants consist of two important tissues, namely, phloem and xylem. Phloem is responsible for the transfer of organic molecules across different cells in the plants. Sieve-tube cells are the specialized cells that are present in the phloem tissue for the transport of carbohydrates.

Answer to Problem 1TYK

Correct answer:

The sieve-tube cells or the sieve-tube elements are the dead, elongated cells found in the phloem of the angiosperms. These elements carry out the transfer of sugar in the plants.

Explanation of Solution

Explanation/Justification for the correct answer:

Option (a) is given as the cell that is responsible for the conduction of sugars. The sieve-tube elements are the specialized cells involved in the conduction of the sugars in the plants. Carbohydrate (starch) is one such form of sugar. On maturity, they are considered as dead cells due to lack of nucleus. These cells are present in the phloem of the angiosperms. Hence, Option (a) is correct.

Explanation for incorrect answer:

Option (b) is given as the widened, perforation-containing, water-conducting cell found only in angiosperms. The perforation-containing, widened cells that carry out transport of water are known as xylem. So, it is a wrong answer.

Option (c) is given as cells that are found in the root hairs and are responsible for the absorption of water and nutrients. The roots hairs are also known as trichoblasts. The trichoblast is formed from the epidermis layer of the root of the plant. So, it is a wrong answer.

Option (d) is given as the nucleated and organelle-rich cells found in phloem. The nucleated and organelle-rich support cells in the phloem are also known as companion cells. The companion cells are those that transport the sugar to the sieve-tube elements in the leaves from the mesophyll. So, it is a wrong answer.

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

Conclusion

Thus, sieve–tube cells represent the class of cells that are specialized for the transportation of sugar in the plants and are found in the phloem.

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

3. In the tomato, red fruit (O+) is dominant over orange fruit (0), and yellow flowers (W+) are dominant over white flowers (w). A cross was made between true-breeding plants with red fruit and yellow flowers, and plants with orange fruit and white flowers. The F₁ plants were then crossed to plants with orange fruit and white flowers, which produced the following results: a. b. 333 red fruit, yellow flowers 64 red fruit, white flowers 58 orange fruit, yellow flowers 350 orange fruit, white flowers Conduct a chi-square analysis to demonstrate that these two genes DO NOT assort independently. Make sure to interpret the P value obtained from your chi-square test. Calculate and provide the map distance (in map units) between the two genes.

Name: Date: Investigation: Is a dog more closely related to a coyote or a wolf? Gray Wolf Species Name: Canis lupus Color: Light gray to black Size: 80-120 pounds, 2.5 feet tall Appearance: broad snout, round ears, long tail Coyote Species Name: Canis latrans Color: Light gray to brown Size: 20-50 pounds, 1.5 feet tall Appearance: narrow snout, pointed ears, long tail Dog, Alaskan Malamute Species Name: Canis lupus familiaris Color: Gray and white or brown and white Size: 70-80 pounds, 2 feet tall Appearance: broad snout, round ears, long tail 1. Examine the images and descriptions above. Underline any similarities between the dog and the wolf. Place a star next to any coyote traits that are similar to the dog. 2. Based on appearance alone, which do you think is the most closely related to a dog? www.biologycorner.com

yu yeuwyuyuierydtgcygucygzycghjcygyugfyudguygcywgduycgyudgs yg

Answer 2

Textbook Question

Chapter 34, Problem 1TYK

What is a sieve-tube element?

a. the sugar-conducting cell found in phloem

b. the widened, perforation-containing, water-conducting cell found only in angiosperms

c. the nutrient- and water-absorbing cell found in root hairs

d. the nucleated and organelle-rich support cell found in phloem

Expert Solution & Answer

Summary Introduction

Introduction:

The plants consist of two important tissues, namely, phloem and xylem. Phloem is responsible for the transfer of organic molecules across different cells in the plants. Sieve-tube cells are the specialized cells that are present in the phloem tissue for the transport of carbohydrates.

Answer to Problem 1TYK

Correct answer:

The sieve-tube cells or the sieve-tube elements are the dead, elongated cells found in the phloem of the angiosperms. These elements carry out the transfer of sugar in the plants.

Explanation of Solution

Explanation/Justification for the correct answer:

Option (a) is given as the cell that is responsible for the conduction of sugars. The sieve-tube elements are the specialized cells involved in the conduction of the sugars in the plants. Carbohydrate (starch) is one such form of sugar. On maturity, they are considered as dead cells due to lack of nucleus. These cells are present in the phloem of the angiosperms. Hence, Option (a) is correct.

Explanation for incorrect answer:

Option (b) is given as the widened, perforation-containing, water-conducting cell found only in angiosperms. The perforation-containing, widened cells that carry out transport of water are known as xylem. So, it is a wrong answer.

Option (c) is given as cells that are found in the root hairs and are responsible for the absorption of water and nutrients. The roots hairs are also known as trichoblasts. The trichoblast is formed from the epidermis layer of the root of the plant. So, it is a wrong answer.

Option (d) is given as the nucleated and organelle-rich cells found in phloem. The nucleated and organelle-rich support cells in the phloem are also known as companion cells. The companion cells are those that transport the sugar to the sieve-tube elements in the leaves from the mesophyll. So, it is a wrong answer.

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

Conclusion

Thus, sieve–tube cells represent the class of cells that are specialized for the transportation of sugar in the plants and are found in the phloem.

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 34, Problem 1TYK

What is a sieve-tube element?

a. the sugar-conducting cell found in phloem

b. the widened, perforation-containing, water-conducting cell found only in angiosperms

c. the nutrient- and water-absorbing cell found in root hairs

d. the nucleated and organelle-rich support cell found in phloem

Expert Solution & Answer

Summary Introduction

Introduction:

The plants consist of two important tissues, namely, phloem and xylem. Phloem is responsible for the transfer of organic molecules across different cells in the plants. Sieve-tube cells are the specialized cells that are present in the phloem tissue for the transport of carbohydrates.

Answer to Problem 1TYK

Correct answer:

The sieve-tube cells or the sieve-tube elements are the dead, elongated cells found in the phloem of the angiosperms. These elements carry out the transfer of sugar in the plants.

Explanation of Solution

Explanation/Justification for the correct answer:

Option (a) is given as the cell that is responsible for the conduction of sugars. The sieve-tube elements are the specialized cells involved in the conduction of the sugars in the plants. Carbohydrate (starch) is one such form of sugar. On maturity, they are considered as dead cells due to lack of nucleus. These cells are present in the phloem of the angiosperms. Hence, Option (a) is correct.

Explanation for incorrect answer:

Option (b) is given as the widened, perforation-containing, water-conducting cell found only in angiosperms. The perforation-containing, widened cells that carry out transport of water are known as xylem. So, it is a wrong answer.

Option (c) is given as cells that are found in the root hairs and are responsible for the absorption of water and nutrients. The roots hairs are also known as trichoblasts. The trichoblast is formed from the epidermis layer of the root of the plant. So, it is a wrong answer.

Option (d) is given as the nucleated and organelle-rich cells found in phloem. The nucleated and organelle-rich support cells in the phloem are also known as companion cells. The companion cells are those that transport the sugar to the sieve-tube elements in the leaves from the mesophyll. So, it is a wrong answer.

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

Conclusion

Thus, sieve–tube cells represent the class of cells that are specialized for the transportation of sugar in the plants and are found in the phloem.

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 34, Problem 1TYK

What is a sieve-tube element?

a. the sugar-conducting cell found in phloem

b. the widened, perforation-containing, water-conducting cell found only in angiosperms

c. the nutrient- and water-absorbing cell found in root hairs

d. the nucleated and organelle-rich support cell found in phloem

Expert Solution & Answer

Summary Introduction

Introduction:

The plants consist of two important tissues, namely, phloem and xylem. Phloem is responsible for the transfer of organic molecules across different cells in the plants. Sieve-tube cells are the specialized cells that are present in the phloem tissue for the transport of carbohydrates.

Answer to Problem 1TYK

Correct answer:

The sieve-tube cells or the sieve-tube elements are the dead, elongated cells found in the phloem of the angiosperms. These elements carry out the transfer of sugar in the plants.

Explanation of Solution

Explanation/Justification for the correct answer:

Option (a) is given as the cell that is responsible for the conduction of sugars. The sieve-tube elements are the specialized cells involved in the conduction of the sugars in the plants. Carbohydrate (starch) is one such form of sugar. On maturity, they are considered as dead cells due to lack of nucleus. These cells are present in the phloem of the angiosperms. Hence, Option (a) is correct.

Explanation for incorrect answer:

Option (b) is given as the widened, perforation-containing, water-conducting cell found only in angiosperms. The perforation-containing, widened cells that carry out transport of water are known as xylem. So, it is a wrong answer.

Option (c) is given as cells that are found in the root hairs and are responsible for the absorption of water and nutrients. The roots hairs are also known as trichoblasts. The trichoblast is formed from the epidermis layer of the root of the plant. So, it is a wrong answer.

Option (d) is given as the nucleated and organelle-rich cells found in phloem. The nucleated and organelle-rich support cells in the phloem are also known as companion cells. The companion cells are those that transport the sugar to the sieve-tube elements in the leaves from the mesophyll. So, it is a wrong answer.

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

Conclusion

Thus, sieve–tube cells represent the class of cells that are specialized for the transportation of sugar in the plants and are found in the phloem.

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:

The plants consist of two important tissues, namely, phloem and xylem. Phloem is responsible for the transfer of organic molecules across different cells in the plants. Sieve-tube cells are the specialized cells that are present in the phloem tissue for the transport of carbohydrates.

Answer to Problem 1TYK

Correct answer:

The sieve-tube cells or the sieve-tube elements are the dead, elongated cells found in the phloem of the angiosperms. These elements carry out the transfer of sugar in the plants.

Explanation of Solution

Explanation/Justification for the correct answer:

Option (a) is given as the cell that is responsible for the conduction of sugars. The sieve-tube elements are the specialized cells involved in the conduction of the sugars in the plants. Carbohydrate (starch) is one such form of sugar. On maturity, they are considered as dead cells due to lack of nucleus. These cells are present in the phloem of the angiosperms. Hence, Option (a) is correct.

Explanation for incorrect answer:

Option (b) is given as the widened, perforation-containing, water-conducting cell found only in angiosperms. The perforation-containing, widened cells that carry out transport of water are known as xylem. So, it is a wrong answer.

Option (c) is given as cells that are found in the root hairs and are responsible for the absorption of water and nutrients. The roots hairs are also known as trichoblasts. The trichoblast is formed from the epidermis layer of the root of the plant. So, it is a wrong answer.

Option (d) is given as the nucleated and organelle-rich cells found in phloem. The nucleated and organelle-rich support cells in the phloem are also known as companion cells. The companion cells are those that transport the sugar to the sieve-tube elements in the leaves from the mesophyll. So, it is a wrong answer.

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

Conclusion

Thus, sieve–tube cells represent the class of cells that are specialized for the transportation of sugar in the plants and are found in the phloem.

Answer 8

Expert Solution & Answer

Summary Introduction

Introduction:

The plants consist of two important tissues, namely, phloem and xylem. Phloem is responsible for the transfer of organic molecules across different cells in the plants. Sieve-tube cells are the specialized cells that are present in the phloem tissue for the transport of carbohydrates.

Answer to Problem 1TYK

Correct answer:

The sieve-tube cells or the sieve-tube elements are the dead, elongated cells found in the phloem of the angiosperms. These elements carry out the transfer of sugar in the plants.

Explanation of Solution

Explanation/Justification for the correct answer:

Option (a) is given as the cell that is responsible for the conduction of sugars. The sieve-tube elements are the specialized cells involved in the conduction of the sugars in the plants. Carbohydrate (starch) is one such form of sugar. On maturity, they are considered as dead cells due to lack of nucleus. These cells are present in the phloem of the angiosperms. Hence, Option (a) is correct.

Explanation for incorrect answer:

Option (b) is given as the widened, perforation-containing, water-conducting cell found only in angiosperms. The perforation-containing, widened cells that carry out transport of water are known as xylem. So, it is a wrong answer.

Option (c) is given as cells that are found in the root hairs and are responsible for the absorption of water and nutrients. The roots hairs are also known as trichoblasts. The trichoblast is formed from the epidermis layer of the root of the plant. So, it is a wrong answer.

Option (d) is given as the nucleated and organelle-rich cells found in phloem. The nucleated and organelle-rich support cells in the phloem are also known as companion cells. The companion cells are those that transport the sugar to the sieve-tube elements in the leaves from the mesophyll. So, it is a wrong answer.

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

Conclusion

Thus, sieve–tube cells represent the class of cells that are specialized for the transportation of sugar in the plants and are found in the phloem.

Answer 9

Expert Solution & Answer

Answer 10

Expert Solution & Answer

Answer 11

Summary Introduction

Introduction:

The plants consist of two important tissues, namely, phloem and xylem. Phloem is responsible for the transfer of organic molecules across different cells in the plants. Sieve-tube cells are the specialized cells that are present in the phloem tissue for the transport of carbohydrates.

Answer 12

Answer to Problem 1TYK

Correct answer:

The sieve-tube cells or the sieve-tube elements are the dead, elongated cells found in the phloem of the angiosperms. These elements carry out the transfer of sugar in the plants.

Answer 13

Explanation of Solution

Explanation/Justification for the correct answer:

Option (a) is given as the cell that is responsible for the conduction of sugars. The sieve-tube elements are the specialized cells involved in the conduction of the sugars in the plants. Carbohydrate (starch) is one such form of sugar. On maturity, they are considered as dead cells due to lack of nucleus. These cells are present in the phloem of the angiosperms. Hence, Option (a) is correct.

Explanation for incorrect answer:

Option (b) is given as the widened, perforation-containing, water-conducting cell found only in angiosperms. The perforation-containing, widened cells that carry out transport of water are known as xylem. So, it is a wrong answer.

Option (c) is given as cells that are found in the root hairs and are responsible for the absorption of water and nutrients. The roots hairs are also known as trichoblasts. The trichoblast is formed from the epidermis layer of the root of the plant. So, it is a wrong answer.

Option (d) is given as the nucleated and organelle-rich cells found in phloem. The nucleated and organelle-rich support cells in the phloem are also known as companion cells. The companion cells are those that transport the sugar to the sieve-tube elements in the leaves from the mesophyll. So, it is a wrong answer.

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