The region of secondary xylem which comprise dead element with highly lignified walls is called

(1) Casparian strip

(2) Heartwood

(3) Sapwood

(4) Bark

Subtopic:  Types of Wood (OLD NCERT) |
 82%
From NCERT
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The peripheral region of secondary xylem lighter in colour is

(1) Sapwood

(2) Heartwood

(3) Annular wood

(4) Bark wood

Subtopic:  Types of Wood (OLD NCERT) |
 92%
From NCERT
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Cork cambium is also called

(1) Phellogen

(2) Annular ring

(3) Early wood

(4) Late wood

Subtopic:  Activity of Cork Cambium |
 95%
From NCERT
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Phellogen, phellem and phelloderm are collectively known as

(1) Phellogram

(2) Periderm

(3) Cork

(4) Phalanges

Subtopic:  Activity of Cork Cambium |
 95%
From NCERT
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Bark that is formed early in season is called __________ bark.

(1) Hard

(2) Soft

(3) Turbid

(4) Lenticels

Subtopic:  Activity of Cork Cambium |
 90%
From NCERT
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Bark formed towards the end of the season is called ________ bark.

(1) Soft

(2) Hard

(3) Turbid

(4) Rigid

Subtopic:  Activity of Cork Cambium |
 94%
From NCERT
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The exchange of gases between the outer atmosphere and internal tissue of stem is through ___________.

(1) Lenticels

(2) Legume

(3) Epidermis

(4) Cambium ring

Subtopic:  Activity of Cork Cambium |
 97%
From NCERT
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In dicot root the vascular cambium is completely _________ in origin.

(1) Primary

(2) Secondary

(3) Tertiary

(4) Quaternary

Subtopic:  Activity of Vascular Cambium (OLD NCERT) |
 92%
From NCERT
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Which one yields fibres?

(1) Coconut

(2) Oak

(3) Teak

(4) Sisso

Subtopic:  Complex Tissue: Phloem |
 76%
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Death of protoplasm is a pre-requisite for vital function like

(1) Transport of sap

(2) Transport of food

(3) Absorption of water

(4) Gaseous exchange

Subtopic:  Complex Tissue: Xylem |
 56%
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