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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Which element of the phloem becomes dead at maturity

(1)sieve tube elements

(2)companion cells

(3)phloem parenchyma

(4)phloem fibres

Subtopic:  Complex Tissue: Phloem |
 71%
From NCERT
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Metaphloem contains _________sieve tubes while protophloem contains____________ sieve tubes.

(1)bigger, narrow

(2)narrow, bigger

(3)narrow, no

(4)no, bigger

Subtopic:  Vascular Tissue System |
 78%
From NCERT
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Epidermal tissue system consists of

(1)epidermal cells

(2)stomata

(3)trichomes, root hairs

(4)All of the above

Subtopic:  Epidermal Tissue System |
 96%
From NCERT
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Which one is true regarding epidermis?

(1)usually single layered

(2)made up of parenchymatous cells

(3)outermost layer of the primary plant body

(4)All of the above

Subtopic:  Epidermal Tissue System |
 97%
From NCERT
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