Free Anatomy Of Flowering Plants (Daily Quiz: 7) NEET Biology Questions & Answers with Detailed Explanation & Full Review

Free Anatomy Of Flowering Plants (Daily Quiz: 7) Time:

Question-1

Well-developed pith is found in

(a)

(b)

(c)

(d)


Question-2

A leaf primordium grows into the adult leaf lamina by means of

(a)

(b)

(c)

(d)


Question-3

Stomata in grass leaf are

(a)

(b)

(c)

(d)

Explanation:

Answer: (b)

Grass being a monocot, has dumb-bell shaped guard cells. Guard cells are generally bean shaped or kidney-shaped in dicots.


Question-4

Read the different components from (i) to (iv) in the list given below and tell the correct order of the components with reference to their arrangement from outer side to inner side in a woody dicot stem.
  1. Secondary cortex
  2. Wood
  3. Secondary phloem
  4. Phellem
The correct order is

(a)

(b)

(c)

(d)

Explanation:

Answer: (b)

In a woody dicot stem, phellem (cork) forms the outermost layer followed by phellogen and then secondary cortex (phelloderm). Secondary phloem forms a narrow circle on the outer side of vascular cambium whereas secondary xylem occurs on the inner side of vascular cambium.


Question-5

Vascular tissues in flowering plants develop from

(a)

(b)

(c)

(d)

Explanation:

Answer: (d)

Dermatogen is the region or histogen of a single layer of outermost cells formed from the apical meristem. Dermatogen gives rise to the epidermis of the stem and other aerial parts. Periblem is the middle histogen which forms the cortex of the stem and roots. The plerome is the central histogen which forms stele or part of the stem and roots inner to endodermis. Part of the plerome that forms vascular tissues is called procambium. The pericycle layer converts into a secondary meristem called cork cambium or phellogen which divides to form a secondary cortex or phelloderm.


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