HARD
Earn 100
Assertion: Xylem and phloem lose their power of dividing and attain maturation.
Reason: These are complex permanent tissues.
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Important Questions on Anatomy of Flowering Plants
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Which of the following are the characteristic features of phloem?
i) Gymnosperms have albuminous cells and sieve cells
ii) Presence of tracheids
iii) They store food materials in the form of starch or fat
iv) They have sieve tube elements that are long, tube-like structures
v) Their end walls are perforated in a sieve like manner
The correct combination is
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| Column-I | Column-II | ||
| [A] | Meristem | (i) | Photosynthesis, storage |
| [B] | Parenchyma | (ii) | Mechanical support |
| [C] | Collenchyma | (iii) | Actively dividing cells |
| [D] | Sclerenchyma | (iv) | Stomata |
| [E] | Epidermal tissue | (v) | Sclereids |
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(i) Phloem parenchyma is absent in most monocots.
(ii) Gymnosperms lack tracheids and vessels.
(iii) Gymnosperms lack companion cells.
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I) a cell thickened corners by deposition of pectin, hemicellulose
II) phloem is present on either side of xylem separated by cambia
III) cells with waxy thick layer preventing water loss
IV) protoxylem towards centre and metaxylem towards periphery of the organ
A) Epidermis
B) Collenchyma
C) Bicollateral vascular bundles
D) Endarch
E) Exarch
F) Endodermis
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Aerenchyma is a
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The most abundant and common tissue of plants is
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