333870
Statement A : Sieve tube elements are also long, tube-like structures, arranged in transverse plane and are associated with the companion cells. Statement B : A mature sieve element possesses a peripheral cytoplasm, large vacuole and a nucleus.
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
Explanation:
Sieve tube elements are also long, tubelike structures, arranged longitudinally and are associated with the companion cells.A mature sieve element possesses a peripheral cytoplasm and a large vacuole but lacks a nucleus.
BIOXI06: ANATOMY OF FLOWERING PLANTS
333871
Statement A : In roots, the protoxylem lies towards the centre (pith) and the metaxylem lies towards the periphery of the organ. Statement B : In stems, the protoxylem lies towards periphery and metaxylem lies towards the centre.
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
Explanation:
In stems, the protoxylem lies towards the centre (pith) and the metaxylem lies towards the periphery of the organ.In roots, the protoxylem lies towards periphery and metaxylem lies towards the centre.
BIOXI06: ANATOMY OF FLOWERING PLANTS
333872
Consider the following statements. I. Companion cells are specialised parenchymatous cells. II. Sieve plates are necessary to allow conduction between sieve tube cells.
1 I is true, but II is false
2 II is true, but I is false
3 Both I and II are true
4 Both I and II are false
Explanation:
The companion cells are specialised parenchymatous cells, which are closely associated with sieve tube elements. End walls of sieve tube element are perforated in a sieve-like manner to form the sieve plates.
BIOXI06: ANATOMY OF FLOWERING PLANTS
333873
Assertion : Phloem is a specialized complex tissue Reason : Phloem is a transport tissue characterized by the presence of sieve tubes, companion cells, phloem fibres and phloem parenchyma cells
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Both Assertion and Reason are incorrect
Explanation:
Both Assertion and Reason are true and Reason is correct explanation of Assertion. The complex tissues are made of more than one type of cells and these work together as a unit. Xylem and phloem constitute the complex tissues in plants. Phloem in angiosperms is composed of sieve tube elements, companion cells, phloem parenchyma and phloem fibres. Gymnosperms have albuminous cells and sieve cells. They lack sieve tubes and companion cells.
BIOXI06: ANATOMY OF FLOWERING PLANTS
333874
Phloem parenchyma is made up of cells which are ____
1 Elongated cells,
2 Tapering cylindrical cells
3 With dense cytoplasm and nucleus
4 All of the above.
Explanation:
Phloem parenchyma is made up of elongated, tapering cylindrical cells which have dense cytoplasm and nucleus.
333870
Statement A : Sieve tube elements are also long, tube-like structures, arranged in transverse plane and are associated with the companion cells. Statement B : A mature sieve element possesses a peripheral cytoplasm, large vacuole and a nucleus.
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
Explanation:
Sieve tube elements are also long, tubelike structures, arranged longitudinally and are associated with the companion cells.A mature sieve element possesses a peripheral cytoplasm and a large vacuole but lacks a nucleus.
BIOXI06: ANATOMY OF FLOWERING PLANTS
333871
Statement A : In roots, the protoxylem lies towards the centre (pith) and the metaxylem lies towards the periphery of the organ. Statement B : In stems, the protoxylem lies towards periphery and metaxylem lies towards the centre.
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
Explanation:
In stems, the protoxylem lies towards the centre (pith) and the metaxylem lies towards the periphery of the organ.In roots, the protoxylem lies towards periphery and metaxylem lies towards the centre.
BIOXI06: ANATOMY OF FLOWERING PLANTS
333872
Consider the following statements. I. Companion cells are specialised parenchymatous cells. II. Sieve plates are necessary to allow conduction between sieve tube cells.
1 I is true, but II is false
2 II is true, but I is false
3 Both I and II are true
4 Both I and II are false
Explanation:
The companion cells are specialised parenchymatous cells, which are closely associated with sieve tube elements. End walls of sieve tube element are perforated in a sieve-like manner to form the sieve plates.
BIOXI06: ANATOMY OF FLOWERING PLANTS
333873
Assertion : Phloem is a specialized complex tissue Reason : Phloem is a transport tissue characterized by the presence of sieve tubes, companion cells, phloem fibres and phloem parenchyma cells
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Both Assertion and Reason are incorrect
Explanation:
Both Assertion and Reason are true and Reason is correct explanation of Assertion. The complex tissues are made of more than one type of cells and these work together as a unit. Xylem and phloem constitute the complex tissues in plants. Phloem in angiosperms is composed of sieve tube elements, companion cells, phloem parenchyma and phloem fibres. Gymnosperms have albuminous cells and sieve cells. They lack sieve tubes and companion cells.
BIOXI06: ANATOMY OF FLOWERING PLANTS
333874
Phloem parenchyma is made up of cells which are ____
1 Elongated cells,
2 Tapering cylindrical cells
3 With dense cytoplasm and nucleus
4 All of the above.
Explanation:
Phloem parenchyma is made up of elongated, tapering cylindrical cells which have dense cytoplasm and nucleus.
333870
Statement A : Sieve tube elements are also long, tube-like structures, arranged in transverse plane and are associated with the companion cells. Statement B : A mature sieve element possesses a peripheral cytoplasm, large vacuole and a nucleus.
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
Explanation:
Sieve tube elements are also long, tubelike structures, arranged longitudinally and are associated with the companion cells.A mature sieve element possesses a peripheral cytoplasm and a large vacuole but lacks a nucleus.
BIOXI06: ANATOMY OF FLOWERING PLANTS
333871
Statement A : In roots, the protoxylem lies towards the centre (pith) and the metaxylem lies towards the periphery of the organ. Statement B : In stems, the protoxylem lies towards periphery and metaxylem lies towards the centre.
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
Explanation:
In stems, the protoxylem lies towards the centre (pith) and the metaxylem lies towards the periphery of the organ.In roots, the protoxylem lies towards periphery and metaxylem lies towards the centre.
BIOXI06: ANATOMY OF FLOWERING PLANTS
333872
Consider the following statements. I. Companion cells are specialised parenchymatous cells. II. Sieve plates are necessary to allow conduction between sieve tube cells.
1 I is true, but II is false
2 II is true, but I is false
3 Both I and II are true
4 Both I and II are false
Explanation:
The companion cells are specialised parenchymatous cells, which are closely associated with sieve tube elements. End walls of sieve tube element are perforated in a sieve-like manner to form the sieve plates.
BIOXI06: ANATOMY OF FLOWERING PLANTS
333873
Assertion : Phloem is a specialized complex tissue Reason : Phloem is a transport tissue characterized by the presence of sieve tubes, companion cells, phloem fibres and phloem parenchyma cells
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Both Assertion and Reason are incorrect
Explanation:
Both Assertion and Reason are true and Reason is correct explanation of Assertion. The complex tissues are made of more than one type of cells and these work together as a unit. Xylem and phloem constitute the complex tissues in plants. Phloem in angiosperms is composed of sieve tube elements, companion cells, phloem parenchyma and phloem fibres. Gymnosperms have albuminous cells and sieve cells. They lack sieve tubes and companion cells.
BIOXI06: ANATOMY OF FLOWERING PLANTS
333874
Phloem parenchyma is made up of cells which are ____
1 Elongated cells,
2 Tapering cylindrical cells
3 With dense cytoplasm and nucleus
4 All of the above.
Explanation:
Phloem parenchyma is made up of elongated, tapering cylindrical cells which have dense cytoplasm and nucleus.
333870
Statement A : Sieve tube elements are also long, tube-like structures, arranged in transverse plane and are associated with the companion cells. Statement B : A mature sieve element possesses a peripheral cytoplasm, large vacuole and a nucleus.
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
Explanation:
Sieve tube elements are also long, tubelike structures, arranged longitudinally and are associated with the companion cells.A mature sieve element possesses a peripheral cytoplasm and a large vacuole but lacks a nucleus.
BIOXI06: ANATOMY OF FLOWERING PLANTS
333871
Statement A : In roots, the protoxylem lies towards the centre (pith) and the metaxylem lies towards the periphery of the organ. Statement B : In stems, the protoxylem lies towards periphery and metaxylem lies towards the centre.
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
Explanation:
In stems, the protoxylem lies towards the centre (pith) and the metaxylem lies towards the periphery of the organ.In roots, the protoxylem lies towards periphery and metaxylem lies towards the centre.
BIOXI06: ANATOMY OF FLOWERING PLANTS
333872
Consider the following statements. I. Companion cells are specialised parenchymatous cells. II. Sieve plates are necessary to allow conduction between sieve tube cells.
1 I is true, but II is false
2 II is true, but I is false
3 Both I and II are true
4 Both I and II are false
Explanation:
The companion cells are specialised parenchymatous cells, which are closely associated with sieve tube elements. End walls of sieve tube element are perforated in a sieve-like manner to form the sieve plates.
BIOXI06: ANATOMY OF FLOWERING PLANTS
333873
Assertion : Phloem is a specialized complex tissue Reason : Phloem is a transport tissue characterized by the presence of sieve tubes, companion cells, phloem fibres and phloem parenchyma cells
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Both Assertion and Reason are incorrect
Explanation:
Both Assertion and Reason are true and Reason is correct explanation of Assertion. The complex tissues are made of more than one type of cells and these work together as a unit. Xylem and phloem constitute the complex tissues in plants. Phloem in angiosperms is composed of sieve tube elements, companion cells, phloem parenchyma and phloem fibres. Gymnosperms have albuminous cells and sieve cells. They lack sieve tubes and companion cells.
BIOXI06: ANATOMY OF FLOWERING PLANTS
333874
Phloem parenchyma is made up of cells which are ____
1 Elongated cells,
2 Tapering cylindrical cells
3 With dense cytoplasm and nucleus
4 All of the above.
Explanation:
Phloem parenchyma is made up of elongated, tapering cylindrical cells which have dense cytoplasm and nucleus.
333870
Statement A : Sieve tube elements are also long, tube-like structures, arranged in transverse plane and are associated with the companion cells. Statement B : A mature sieve element possesses a peripheral cytoplasm, large vacuole and a nucleus.
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
Explanation:
Sieve tube elements are also long, tubelike structures, arranged longitudinally and are associated with the companion cells.A mature sieve element possesses a peripheral cytoplasm and a large vacuole but lacks a nucleus.
BIOXI06: ANATOMY OF FLOWERING PLANTS
333871
Statement A : In roots, the protoxylem lies towards the centre (pith) and the metaxylem lies towards the periphery of the organ. Statement B : In stems, the protoxylem lies towards periphery and metaxylem lies towards the centre.
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
Explanation:
In stems, the protoxylem lies towards the centre (pith) and the metaxylem lies towards the periphery of the organ.In roots, the protoxylem lies towards periphery and metaxylem lies towards the centre.
BIOXI06: ANATOMY OF FLOWERING PLANTS
333872
Consider the following statements. I. Companion cells are specialised parenchymatous cells. II. Sieve plates are necessary to allow conduction between sieve tube cells.
1 I is true, but II is false
2 II is true, but I is false
3 Both I and II are true
4 Both I and II are false
Explanation:
The companion cells are specialised parenchymatous cells, which are closely associated with sieve tube elements. End walls of sieve tube element are perforated in a sieve-like manner to form the sieve plates.
BIOXI06: ANATOMY OF FLOWERING PLANTS
333873
Assertion : Phloem is a specialized complex tissue Reason : Phloem is a transport tissue characterized by the presence of sieve tubes, companion cells, phloem fibres and phloem parenchyma cells
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Both Assertion and Reason are incorrect
Explanation:
Both Assertion and Reason are true and Reason is correct explanation of Assertion. The complex tissues are made of more than one type of cells and these work together as a unit. Xylem and phloem constitute the complex tissues in plants. Phloem in angiosperms is composed of sieve tube elements, companion cells, phloem parenchyma and phloem fibres. Gymnosperms have albuminous cells and sieve cells. They lack sieve tubes and companion cells.
BIOXI06: ANATOMY OF FLOWERING PLANTS
333874
Phloem parenchyma is made up of cells which are ____
1 Elongated cells,
2 Tapering cylindrical cells
3 With dense cytoplasm and nucleus
4 All of the above.
Explanation:
Phloem parenchyma is made up of elongated, tapering cylindrical cells which have dense cytoplasm and nucleus.
