Question. Heartwood differs from sapwood in
(a) presence of rays and fibres
(b) absence of vessels and parenchyma
(c) having dead and non-conducting elements
(d) being susceptible to pests and pathogens.
Answer
C
Question. Vascular tissues in flowering plants develop from
(a) periblem
(b) dermatogen
(c) phellogen
(d) plerome.
Answer
D
Question. For a critical study of secondary growth in plants, which one of the following pairs is suitable?
(a) Teak and pine
(b) Deodar and fern
(c) Wheat and maiden hair fern
(d) Sugarcane and sunflower
Answer
A
Question. Diffuse porous woods are characteristic of plants growing in
(a) alpine region
(b) cold winter regions
(c) temperature climate
(d) tropics.
Answer
D
Question. Which of the following meristems is responsible for extrastelar secondary growth in dicotyledonous stem?
(a) Interfascicular cambium
(b) Intercalary meristem
(c) Phellogen
(d) Intrafascicular cambium
Answer
C
Question. The periderm includes
(a) secondary phloem
(b) cork
(c) cambium
(d) all of these.
Answer
B
Question. As a tree grows older, which of the following increases more rapidly in thickness?
(a) Heart wood
(b) Sapwood
(c) Phloem
(d) Cortex
Answer
A
Question. Periderm is produced by
(a) vascular cambium
(b) fascicular cambium
(c) phellogen
(d) intrafascicular cambium.
Answer
C
Question. Which exposed wood will decay faster?
(a) Sapwood
(b) Softwood
(c) Wood with lot of fibres
(d) Heartwood
Answer
A
Question. Abnormal/anomalous secondary growth occurs in
(a) Dracaena
(b) ginger
(c) wheat
(d) sunflower.
Answer
A
Question. Vascular cambium produces
(a) primary xylem and primary phloem
(b) secondary xylem and secondary phloem
(c) primary xylem and secondary phloem
(d) secondary xylem and primary phloem.
Answer
B
Question. Out of diffuse porous and ring porous woods, which is correct?
(a) Ring porous wood carries more water for short period.
(b) Diffuse porous wood carries more water.
(c) Ring porous wood carries more water when need is higher.
(d) Diffuse porous wood is less specialised but conducts water rapidly throughout.
Answer
C
Question. Cork is formed from
(a) cork cambium (phellogen)
(b) vascular cambium
(c) phloem
(d) xylem.
Answer
A
Question. Cycas stem shows
(a) porous wood
(b) manoxylic wood
(c) pycnoxylic wood
(d) ring porous wood
Answer
B
Question. Aerenchyma is found in
(a) parenchyma
(b) xylem
(c) phloem
(d) sclerenchyma
Answer
A
Question. Which of the following tissue is absent in vascular bundles of monocot stem ?
(a) Xylem
(b) Phloem
(c) Cambium
(d) All of these
Answer
C
Question. Cork cambium is a
(a) lateral meristem
(b) apical meristem
(c) intercalary meristem
(d) primitive meristem
Answer
A
Question. Endodermis is a part of
(a) cortex
(b) pericycle
(c) medulla
(d) epidermis
Answer
A
Question. Lateral root in higher plants arise from
(a) cortex
(b) pericycle
(c) epidermis
(d) endodermis
Answer
B
Question. Cambium of root is an example of
(a) apical meristem
(b) intercalary meristem
(c) primary meristem
(d) secondary meristem
Answer
D
Question. Which of the following is enucleate at maturity?
(a) Companion cell
(b) Meristematic cell
(c) Parenchyma
(d) Sieve tube cell
Answer
D
Question. Porous wood contains
(a) vessels
(b) tracheids
(c) fibres
(d) parenchyma
Answer
A
Question. Passage cells are found in
(a) endodermis
(b) pericycle
(c) cortex
(d) epiblema
Answer
A
Question. Fascicular cambium is the cambium of vascular bundle of
(a) monocot stem
(b) dicot stem
(c) monocot leaf
(d) dicot leaf
Answer
B
Question. Mesophyll is usually differentiated in
(a) monocot leaf
(b) isobilateral leaf
(c) dorsiventral leaf
(d) both ‘a’ and ‘b’
Answer
C
Question. In a dicotyledonous stem, the sequence of tissues from the outside to the inside is
a) phellem-pericycle-endodermis-phloem
(b) phellem-phloem-endodermis-pericycle
(c) phellem-endodermis-pericycle-phloem
(d) pericycle-phellem-endodermis-phloem
Answer
C
Question. The quiescent centre in root meristem serves as a
(a) site for storage of food which is utilized during maturation.
(b) reservoir of growth hormones.
(c) reserve for replenishment of damaged cells of the meristem.
(d) region for absorption of water.
Answer
C
Question. In a plant organ which is covered by periderm and in which the stomata are absent, some gaseous exchange still takes place through
(a) aerenchyma
(b) trichomes
(c) pneumatophores
(d) lenticels
Answer
D
Question. Companion cells in plants are associated with
(a) vessels
(b) sperms
(c) sieve elements
(d) guard cells
Answer
C
Question. Cork cambium results in the formation of cork which becomes impermeable to water due to the accumulation of
(a) resins
(b) suberin
(c) lignins
(d) tannins
Answer
B
Question. Which one of the following statements pertaining to plant structure is correct?
(a) Cork lacks stomata but lenticels carry out transpiration.
(b) Passage cells help in transfer of food from cortex to phloem.
(c) Sieve tube elements possess cytoplasm but no nuclei.
(d) The shoot apical meristem has a quiescent centre.
Answer
C
Question. In which one of the following would you expect to find glyoxysomes ?
(a) Endosperm of wheat
(b) Endosperm of castor
(c) Palisade cells in leaf
(d) Root hairs
Answer
B
Question. Grafting is successful in dicots but not in monocots because the dicots have
(a) vascular bundles arranged in a ring
(b) cambium for secondary growth
(c) vessels with elements arranged end to end
(d) cork cambium
Answer
B
Question. In the sieve elements, which one of the following is the most likely function of P-proteins?
(a) Deposition of callose on sieve plates.
(b) Providing energy for active translocation.
(c) Autolytic enzymes.
(d) Sealing mechanism on wounding.
Answer
A
Question. Two cross-sections of stem and root appear simple, when viewed by naked eye. But under microscope, they can be differentiated by
(a) exarch condition of root and stem
(b) endarch condition of stem and root
(c) endarch condition of root and exarch condition of stem
(d) endarch condition of stem and exarch condition of root
Answer
D
Question. If a stem is girdled
(a) Root dies first
(b) Shoot dies first
(c) Both die together
(d) None of the above would die
Answer
A
Question. Which of the following statement(s) is/are true? (A) Uneven thickening of cell wall is characteristic of sclerenchyma. (B) Periblem forms cortex of the stem and the root. (C) racheids are the chief water transporting elements in gymnosperms. (D) Companion cell is devoid of nucleus at maturity. (E) The Commercial cork is obtained from Quercus suber.
(a) A and D only
(b) B and E only
(c) C and D only
(d) B, C and E only
Answer
D
Question. Sclerenchyma usually_______ and ________ protoplasts.
(a) live, without
(b) dead, with
(c) live, with
(d) dead, without
Answer
D
Question. Contractile tissues have the following features (i) Mesodermal in origin (ii) They contain stretch receptors. (iii) Rhythmic contractions are seen in them (iv) They do not fatigue uring the life of the animal Which of the above are characteristics of sphincters?
(a) All the four
(b) Only (i), (ii) and (iii)
(c) Only (i), (ii) and (iv)
(d) Only (i), (iii) and (iv)
Answer
B
Question. Meristematic tissue responsible for increase in girth of tree trunk is
(a) Apical meristem
(b) Intercalary meristem
(c) Lateral meristem
(d) Phellogen
Answer
C
Question. In stems, the protoxylem lies towards the _____________ and the metaxylem lies towards the ____________ of the organ.
(a) centre; periphery
(b) periphery; centre
(c) periphery; periphery
(d) centre; centre
Answer
A
