The elements of xylem which does food storage is

(1)tracheids

(2)vessels

(3)xylem parenchyma

(4) xylem fibres

Subtopic:  Complex Tissue: Xylem |
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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 |
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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 |
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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 A and C

Subtopic:  Complex Tissue: Xylem |
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Phloem in angiosperms is composed of

(1)sieve tube elements, companion cells, phloem parenchyma, phloem fibres

(2)sieve cells, companion cells, phloem parenchyma, phloem fibres

(3)albuminous cells, companion cells, phloem parenchyma, phloem fibres

(4)Both A and B

Subtopic:  Complex Tissue: Phloem |
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Gymnosperms have

(1)albuminous cells

(2)sieve cells

(3)Both A and B

(4) comapanion cells

Subtopic:  Complex Tissue: Phloem |
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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 |
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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 |
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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 |
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Phloem fibres  are

(1)also known as bast fibres

(2)made up of sclerenchymatous cells

(3)absent in primary phloem

(4)All of these

Subtopic:  Complex Tissue: Phloem |
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