The desert grasses, often curls their leaf to minimise water loss due to presence of
1. Spines
2. Palisade parenchyma
3. Bundle sheath cells
4. Bulliform cells
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyTyloses are balloon-like outgrowths in the lumen of secondary xylem tracheids and vessel of duramen region. These are actually:-
(1) outgrowth of vessels of xylem
(2) ingrowth of vessels
(3) outgrowth of parenchymatous cell
(4) swelling of xylem fibres for no function
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyPith cavity occurs in the stem of ?
(1) Helianthus
(2) Zea mays
(3) Cucurbita
(4) Dracaena
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyMatch the Column I and II.
Column I |
Column II |
A. Bulliform cells |
1. Stomata |
B. Guard cells |
2. Aerating pore |
C. Lenticels |
3. Accessory cells |
D. Subsidiary cell |
4. Isobilateral cells |
A B C D
(a) 1 2 3 4
(b) 3 1 2 4
(c) 4 1 2 3
(d) 4 3 2 1
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyRoot cambium is derived from?
(1) primary meristem
(2) secondary meristem
(3) intercalary meristem
(4) apical meristem
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhich one of the following comprises only simple tissue?
1. Parenchyma, Collenchyma and Sclerenchyma
2. Parenchyma, Xylem and Collenchyma
3. Parenchyma, Xylem and Sclerenchyma
4. Parenchyma, Xylem and Phloem
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyMatch the following
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 |
A. A-i, B-iii, C-v, D-ii, E-iv
B. A-iii, B-i, C-ii, D-v, E-iv
C. A-ii, B-iv, C-v, D-i, E-iii
D. A-v, B-iv, C-iii, D-ii, E-i
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhat is the destiny of primary xylem in a dicot root showing extensive secondary growth?
1. It is retained in the centre of the axis
2 It gets crushed
3. May or may not get crushed
4. It gets surrounded by primary phloem
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhich one of the following cell types always give rise to secondary cortex?
A. fusiform initial cells
B, root cap
C. protoderm
D. Phellogen
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhile removing the skin of a potato tuber, we remove
A. Periderm
B. Epidermis
C. Cuticle
D. Sapwood
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology