Assertion: Apical meristem of root is subterminal.
Reason: At the terminal end of root, root cap is present.
Assertion: Histogen theory is not applicable to shoot apex.
Reason: The shoot apex is not clearly divided into three layers.
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Assertion : Higher plants have meristematic regions for indefinite growth.
Reason : Higher plants have root and shoot apices.
Assertion: Apical meristem and intercalary meristem both are primary meristems.
Reason: Both of these meristems appear early in life of a plant and help in the formation of the primary plant body.
Assertion: Lateral meristems include fascicular vascular cambium, interfascicular cambium and cork-cambium.
Reason: These are responsible for forming the secondary tissues.
Assertion: Higher plants have meristematic regions for indefinite growth.
Reason: Higher plants have root and shoot apices.
Assertion: Quiescent centre is found in the centre of the root apex.
Reason: It consists of actively dividing cells.
Assertion: Intercalary meristems increase length of plant like apical meristems.
Reason: It originates from the apical meristems
Assertion: Apical and intercalary meristems contribute to the growth in length, while the lateral meristems cause increase in girth in maize.
Reason: Apical and intercalary meristems always increase the height of plants.
Assertion: In grasses and cereals, intercalary meristems are present.
Reason: Intercalary meristems form permanenttissues.
Assertion: Collenchyma forms the hypodermis of dicotyledon stems.
Reason : This is the reason for flexibility of dicotyledonous stems.
Assertion : Aerenchyma help in buoyancy to hydrophyte plants.
Reason : The large air chambers are present in aerenchyma.
Assertion : Collenchymatous cells show thickenings of pectin.
Reason : Collenchyma is thick walled dead tissue.
Assertion: A simple tissue is made of only one type of cells.
Reason: Various simple tissues in plants are parenchyma, collenchyma and sclerenchyma.
Assertion: Sclerenchyma cells do not possess plasmodesmata.
Reason: The cell walls of some permanent tissues are heavily lignified.
Assertion: Idioblasts are derived from parenchyma.
Reason: Secretory cells are modified parenchyma.
Assertion: Sclerenchyma consists of long narrow cells with thick lignified cell walls.
Reason: They are usually dead and without protoplasm.
Assertion: Many organs of aquatic plants float in water.
Reason: Large air gaps are present in the collenchyma tissues of lotus leaf.
Assertion: Sclereids are found in the fruit walls of nuts, pulp of fruits like guava, pear and sapota
and seed coats of legumes.
Reason: Sclereids are spherical, oval or cylindrical, highly thickened dead cells with narrow lumen.
Assertion : In angiosperms, the conduction of water is more efficient because their xylem has vessels.
Reason : Conduction of water by vessel elements is an active process with energy supplied by xylem parenchyma rich in mitochondria.