CHAPTER-6 : ANATOMY OF FLOWERING PLANTSMultiple Choice Questions- Which of the following is not the part of stele?
(a) Pericycle (b) Vascular bundle
(c) Pith (d) Endodermis - Which of the following statements is/are incorrect for the
companion cells?
I. They are the conducting part of phloem.
II. Their nuclei control the activities of sieve tube cells.
III. They are associated with the phloem parenchyma
through compound plasmodesmata.
IV. They help in maintaining the pressure gradient in
sieve tube cells.
(a) I and II
(b) I and III
(c) III and IV
(d) II and IV - Select the correct statement.
(a) Vessels do not help in transport but provide
mechanical strength.
(b) Wood parenchyma helps in lateral conduction of sap.
(c) Calyptrogen differentiates in dicots and gives rise to
root cap.
(d) In sunken stomata, subsidiary cells lie below the
guard cells. - According to histogen theory of Hanstein
(a) dermatogen forms epiblema and root cap in dicots
(b) periblem forms cortex, endodermis and pericycle in
both root and shoot
(c) plerome forms vascular strand and pith in shoot
(d) dermatogen forms root cap and cortex in roots. - Select the mismatched pair.
(a) Hadrocentric bundle - Phloem surrounds xylem
(b) Open collateral bundle - Fascicular cambium present
(c) Bicollateral bundle - Xylem on both inner and
outer side of phloem
(d) Radial bundle - Xylem and phloem are on
separate radii - Endodermis is considered as a ‘biological check post’
because
(a) it is present between stele and pericycle
(b) it is barrel-shaped and do not have intercellular
spaces
(c) it is rich in starch grains and have starch sheath
(d) it possesses ligno-suberised Casparian strip.
7. Elongation of bamboo and grass stem occurs due to the
activity of
(a) lateral meristem
(b) apical meristem
(c) intercalary meristem
(d) secondary meristem.
8. Which of the following sequence correctly represents the
arrangement of tissues from inner to outer side, after the
secondary growth in a dicot stem?
(a) Secondary xylem → Primary xylem → Primary
phloem → Crushed phloem → Secondary phloem
→ Phellem → Phellogen → Phelloderm
(b) Primary phloem → Secondary phloem → Crushed
xylem → Secondary xylem → Primary xylem →
Phellem → Phelloderm → Phellogen
(c) Primary xylem → Secondary xylem → Secondary
phloem → Crushed phloem → Primary phloem →
Phellogen → Phelloderm → Phellem
(d) Primary xylem → Secondary xylem → Secondary
phloem → Crushed phloem → Phelloderm →
Phellogen → Phellem
9. Cork cambium in a dicot stem produces
(a) cork on outer side and secondary cortex on inner
side
(b) cork on both outer and inner sides
(c) secondary cortex on both the sides
(d) secondary vascular tissues on inner side and secondary
cortex on outer side.
10. Consider the following statements and select the correct
pair of statement regarding secondary growth in stem.
I. Cells of xylem rays differentiate to form interfascicular
cambium.
II. In spring wood, fibres and tracheids are less abundant
than in autumn wood.
III. Hardwood is porous wood while softwood is nonporous
wood.
(a) I and II (b) I and III
(c) II and III (d) None of these
Match The Columns- Match Column I with Column II.
Column I Column II
A. Mesophyll (i) Passage cells
B. Periderm (ii) Isobilateral leaf
C. Endodermis (iii) Lenticels
D. Subsidiary cells (iv) Accessory cells
E. Bulliform cells (v) Palisade cells