- Which type of meristem involve in the primary growth?
a. Lateral meristem
b. Cambium
c. Vascular cambium
d. None - The separation of individual cells by the dissolution of middle lamella?
a. Cytokinesis
b. Maceration
c. Division
d. Isolation - The cell wall materials come from the __.
a. Mitochondria
b. Nucleus
c. Lysosomes
d. Golgi Apparatus - Which one of the following is not the process of incrustation?
a. Suberisation
b. Lignification
c. Cutinization
d. Lapidification - Each cellulosic microfibril contains up to ____________cellulose molecules.
a. 10,000
b. 20,000
c. 25,000
d. 50,000 - The secondary thickening due to lignin has a pattern in the form of a ring, it is called _.
a. Spiral
b. Annular
c. Scalariform
d. None - Pitts are _.
a. Unthickening
b. More thickened areas
c. Cutinized areas
d. Both b & c - The thickened central part of a pit in the form of a disc?
a. Border
b. Torus
c. Pit membrane
d. Pit field - Which one is incorrect in the case of permanent tissue?
a. Formed from meristems
b. May be living or dead
c. Fully differentiated tissue
d. All are correct - Intercalary meristems are specifically found in __.
a. Grasses
b. Bryophytes
c. Both
d. None - Primary meristem formed from_____________.
a. Embryonic cells
b. Derives from cambium
c. Actually, these are cambium tissue
d. Both b & c - The primary meristem has apical initials are called as _____.
a. Promeristem
b. Mass meristem
c. Rib meristem
d. All - The period between the successive initiation of two leaves?
a. Intercalary period
b. Refractive period
c. Interphasic growth phase
d. Plastochron - Which one of the following is responsible for the formation of the entire apex in pteridophytes?
a. Apical cell
b. Apical initials
c. Both
d. None - According to histogen theory the zone responsible for the formation of the epidermis?
a. Promeristem
b. Dermatogen
c. Plerome
d. Periblem - According to histogen theory the zone responsible for the formation of the cortex?
a. Promeristem
b. Dermatogen
c. Plerome
d. Periblem - According to histogen theory the zone responsible for the formation of stele?
a. Promeristem
b. Dermatogen
c. Plerome
d. Periblem - What was the major problem with the histogen theory?
a. No predetermination of mature tissues
b. Spermatophyte lacks any difference between periblem and plerome
c. Both
d. None - Tunica corpus theory was proposed by ___.
a. Schmidt
b. Dixon
c. Van Neil
d. Chalayan - Which one is correct in the case of tunica?
a. Always single layer
b. Always more than one layer
c. Maybe one or two layers but not fixed
d. One or two layers but always fixed - Which one of the following cells has angular thickenings?
a. Collenchyma
b. Meristems
c. Parenchyma
d. Pseudoparenchyma - Which one is not found in the phloem?
a. Companion cell
b. Sieve tube cells
c. Vessels
d. All present - Which one is not a type of xylary fibers?
a. Libriform
b. Fiber-tracheid
c. Both
d. None - Which one is an extra-xylary fiber?
a. Phloem fibbers
b. Cortical fibers
c. Perivisceral fibers
d. All - Star-shape sclereids?
a. Osteosclereids
b. Asterosclereids
c. Brachysclereids
d. Macrosclereids
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