Which one is true for sclereids

(1)highly thickened dead walls with narrow lumen

(2)present in fruit walls of nuts

(3)pulp of guava, pear, and sapots

(4)All of the above

Subtopic:  Simple Tissue: Chollenchyma & Sclerenchyma |
 97%
From NCERT
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Sclerenchymatous fibres are

1. thick walled, elongated and pointed cells

2. contains simple and bordered pits

3. smallest  cells in plant body

4. All of these

Subtopic:  Simple Tissue: Chollenchyma & Sclerenchyma |
From NCERT
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Which one is true regarding xylem?

1. vessels are absent in gymnosperms

2. cells of vessel are called vessel members

3. tracheid and vessel lack protoplasm

4. All of these

Subtopic:  Complex Tissue: Xylem |
 89%
From NCERT
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The elements of xylem which does food storage is

(1)tracheids

(2)vessels

(3)xylem parenchyma

(4) xylem fibres

Subtopic:  Complex Tissue: Xylem |
 86%
From NCERT
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In angiosperms, the main water transporting elements are

(1)tracheids

(2)vessels

(3)Both A and B

(4)tracheids, vessels, xylem fibres, xylem parenchyma

Subtopic:  Complex Tissue: Xylem |
 81%
From NCERT
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The first formed primary xylem elements are__________and later formed is _____________

(1)protoxylem , metaxylem

(2)metaxylem , protoxylem

(3)tracheids, vessels

(4)Both B and C

Subtopic:  Complex Tissue: Xylem |
 94%
From NCERT
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The type of primary xylem when protoxylem lies towards the pith is known as

1. endarch

2. exarch

3. endoexarch

4. Both (1) and (3)

Subtopic:  Complex Tissue: Xylem |
 86%
From NCERT
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A mature sieve tube elements have

(1)large vacuole

(2)peripheral cytoplasm

(3)lack nucleus

(4)All of the above

Subtopic:  Complex Tissue: Phloem |
 92%
From NCERT
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Pressure gradient in the sieve tubes is maintained by

(1)companion cells

(2)phloem fibres

(3)phloem parenchyma

(4)All of these

Subtopic:  Complex Tissue: Phloem |
 90%
From NCERT
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Which of the following is true for phloem parenchyma?

(1)made up of elongated, tapering cylindrical cells

(2)have dense cytoplasm and nucleus

(3)stores food material and resins, latex and mucilage

(4)All of the above

Subtopic:  Complex Tissue: Phloem |
 91%
From NCERT
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