What 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 & BiologyIn which of the following pairs of parts of a flowering plant is epidermis absent?
A. Root tip and shoot tip
B. Shoot bud and floral bud
C. Ovule and seed
D. Petiole and pedicel
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyEpiblema of roots is same as
A. Pericycle
B. Endodermis
C. Epidermis
D. Stele
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyMatch the following
A.Cuticle | i. guard cells |
B. Bulliform cells | ii. single layer |
C. Stomata | iii. waxy layer |
D. Epidermis | iv. empty colourless cell |
A. A-iii, B-iv, C-i, D-ii
B. A-i, B-ii, C-iii, D-iv
C. A-iii, B-ii, C-iv, D-i
D. A-iii, B-ii, C-i, D-iv
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyIdentify the tissue system from among the following
A. Parenchyma
B. Xylem
C. Epidermis
D. Phloem
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyA conjoint and open vascular bundle will be observed in the transverse section of
A. Monocot root
B. Monocot stem
C. Dicot root
D. Dicot stem
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyAnatomically fairly old root is distinguished from dicotyledonous stem by
1. Position of Protoxylem
2. Absence of secondary xylem
3. Absence of secondary phloem
4. Presence of cortex
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhich of the following is correct
1. Uneven thickening of cell wall is characteristic of sclerenchyma
2. Periblem forms cortex of stem and root
3. Tracheids are chief water conducting element in gymnosperms
4. Companion cell is devoid of nucleus at maturity
A. 2,3
B. 1,4
C. 1,2
D. 4
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology