Biology Class 11

Biology Class 11th Chapter 6 mcqs

Anatomy of Flowering Plants Objective Questions

  1. Pith is very well developed in

(a) monocot root and monocot srem

(b) monocot root and dicot root

(c) dicot root and monocot stem

(d) monocot root and dicot stem

Answer: (d) monocot root and dicot stem

  1. Which of the following helps in the curling of the leaf surface?

(a) Bulliform cells

(b) Xylem tissue

(c) Palisade parenchyma

(d) Bundle sheath cells

Answer: (a) Bulliform cells

  1. Walls of sclerenchyma are

(a) rigid

(b) lignified

(c) pectinised

(d) suberized

Answer: (b) lignified

  1. Fusifrom initial cells of cambium from

(a) vascular rays

(b) tracheary elements

(c) ray parenchyma

(d) phloem parenchyma

Answer: (b) tracheary elements

  1. Closed vascular bundles lacks

(a) pith

(b) xylem

(c) cambium

(d) xylem vessels

Answer: (c) cambium

  1. After the secondary growth, the oldest layer of secondary phloem in a dicot stem is located

(a) just outside the vascular cambium

(b) just inside the vascular cambium

(c) just inside the vascular phloem

(d) just outside the secondary xylem

Answer: (c) just inside the vascular phloem

  1. The innermost layer of cortex which shows casparian thickenings in its cells is called as

(a) epidermis

(b) endodermis

(c) pericycle

(d) exodermis

Answer: (b) endodermis

  1. Vessels differ from tracheids

(a) in being living

(b) in being derived from a single cell

(c) in that they consist of vertical row of cells with cross walls dissolved

(d) in coducting water and minerals

Answer: (c) in that they consist of vertical row of cells with cross walls dissolved

  1. Endodermis cells are rich in

(a) cellulose

(b) starch grains

(c) fibers

(d) resins and wax

Answer: (b) starch grains

  1. Quiescent centre is present in the

(a) apical meristem

(b) shoot meristem

(c) lateral meristem

(d) root meristem

Answer: (d) root meristem

  1. Closed vascular bundles lacks

(a) pith

(b) xylem

(c) cambium

(d) xylem vessels

Answer: (c) cambium

  1. Which of the following is not a feature of spring wood?

(a) Color of the wood is light.

(b) Density is less.

(c) Cambium is active.

(d) Lesser number of xylary elements.

Answer: (d) Lesser number of xylary elements.

  1. In a monocot leaf

(a) bulliform cells are absent from the eqidermis

(b) veins from a network

(c) mesophyll is well differentiated into palisade and spongy parenchyma

(d) mesophyll is not differentiated into palisade and spongy parenchyma

Answer: (d) mesophyll is not differentiated into palisade and spongy parenchyma

  1. T.S. of a young dicot root can be distinguished from that of a young dicot stem by the presence of

(a) radial arrangement of xylem and phloem

(b) collateral arrangement of xylem and phloem

(c) interfascicular cambium

(d) intrafascicular cambium

Answer: (a) radial arrangement of xylem and phloem

  1. Fusifrom initial cells of cambium from

(a) vascular rays

(b) tracheary elements

(c) ray parenchyma

(d) phloem parenchyma

Answer: (b) tracheary elements

  1. Callose deposition is found in

(a) tracheids

(b) companion cells

(c) sieve areas

(d) phloem parenchyma

Answer: (c) sieve areas

  1. Stem develops from

(a) radicle

(b) cotyledon

(c) mesocarp

(d) plumule

Answer: (d) plumule

  1. Stem grows in girth due to

(a) outer cortical

(b) epidermis

(c) vascular cambium

(d) phellogen

Answer: (c) vascular cambium

  1. Which of the following is true about heartwood?

(a) They are dead but gives mechanical support to stem.

(b) They are light in color.

(c) They conduct water and minerals.

(d) 1 and 3

Answer: (a) They are dead but gives mechanical support to stem.

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