Bark refers to
(1) Phellem + Phellogen + Phelloderm
(2) Periderm + Cortex
(3) Phellem + Phelloderm + Secondary phloem
(4) Periderm + Cortex + Pericycle + Secondary phloem
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe branched sclereids present in hydrophytes are:-
(1) osteosclereids
(2) trichosclereids
(3) macrosclereids
(4) astrosclereids
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhy are vascular bundles closed in monocots?
(1) Xylem and Phloem are present
(2) Xylem and phloem occur in separate bundles
(3) Vascular cambium is present between xylem and phloem
(4) Vascular cambium is not present
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyGiven figure shows:-
(a) structure of lenticel
(b) hydathode showing gaseous vapour exchange
(c) fungus reproducing by spore formation
(d) algae reproducing by spore formation
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologySelect the correct pair amongst the following.
(1) Spring wood - light colour, high density
(2) Spring wood - dark colour, low density
(3) Autumn wood - light colour, high density
(4) Autumn wood - dark colour, high density
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyAs secondary growth proceeds, in a dicot stem, the thickness of.
(1) sapwood increases
(2) heartwood increases
(3) both sapwood and heartwood increases
(4) both sapwood and heartwood remains the same
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe 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 & Biology