Secondary Growth in Plants

Fascicular cambium is the cambium of a vascular bundle of:

Phellogen and phellem respectively denote:

Select the correct pair.

Match List - I with List - II.

Select the correct answer from the options given below.

Choose the incorrect option among the following:

Find the correct order of components given below from the outer side to inner side in a woody dicot stem.
(I) Secondary cortex
(II) Wood
(III) Secondary phloem
(IV) Phellem

Consider the following statements, choose the correct answer.
In the spring season, the vascular cambium
i. is less active.
ii. produces a large number of xylem elements.
iii. forms vessels with wide cavities.

Annual rings are the bands of

Assertion : Sapwood is less durable than the heartwood.

Reason : Hollow tree trunks are due to the disappearance of sapwood.

Assertion : All tissues lying inside vascular cambium are called as bark.

Reason : Bark is made up of phellogen, phellem and phelloderm lying inside secondary phloem.

Which of the following statements is / are not true

A. Cork cambium is otherwise called phellogen
B. Cork is otherwise called phellem
C. Secondary cortex is otherwise called periderm
D. Cork cambium, cork and secondary cortex are collectively called phelloderm

Heartwood differs from sapwood in

Bark includes

Read the following statements

(a) The youngest layer of phloem lies just outside the cork cambium.
(b) Sapwood is functional part of the secondary xylem or wood.
(c) Nonporous wood is hard wood that is found in angiospermic plants.
(d) Annuals rings are absent in dicot root after secondary growth due to little seasonal variation in soil temperature.

Pick up the correct statements.

The tissues from which cambium ring is originated in dicot root and dicot stem.

Vascular cambium produces:

Match the following:

Age of the tree can be calculated from _____

Spring wood can be differentiated from autumn wood by