Types of wood - class-VI
Description: types of wood | |
Number of Questions: 54 | |
Created by: Kalki Agrawal | |
Tags: biology normal secondary growth in stem and root histology and anatomy of flowering plants botany anatomy of flowering plants plants in daily life secondary growth |
Islands of phloem are found in the wood of strychnos. This is due to.
Islands of parenchyma are embedded in wood of ____________.
Wood with specific gravity of less than $0.2$ is?
Which one is an example of wood fibres?
Balck wood is obtained from
Out of diffuse porous and ring porous woods, which is correct?
Spring wood is $\underline{(a)}$ in colour & has $\underline{(b)}$ density as compared to heart wood.
Match column i with column - ii and select the correct answer.
Coloumn-1 | Column-2 | |
---|---|---|
A | Spring wood | Duramen |
B | Autumn wood | Alburnum |
c | Heart wood | Late wood |
d | Sap wood | Early wood |
Which of the following statements are correct about heart wood?
i) It does not help in water conduction.
ii) It is also called alburnum.
iii) It is light in colour and is very soft
iv) It has tracheary elements which are filled with tannins, resins,etc.
Alburnum is also called as
Heart wood provides?
The wood is actually a?
Diffuse porous woods are characteristic of plants growing in ________________.
Heartwood differs from sapwood in ____________________.
In autumn, cambium is
Autumn wood is distinguishable from spring wood in having
Heart wood is
The wood of commerce is?
Which one of the following has dead cells?
Lighest wood is
Match the species with type of wood
(a) Tectona grandis
(b) Cedrus deodara
(c) Shorea robusta
(d) Dalbergia sisso
(e) Softwood
(f) Hardwood
Lenticels are patches of
No vessels are found in the wood of
When one wood is lighter in colour with lower density, the other wood is darker with higher density. They are.
Heartwood is absent even in very old trunk of
Hockey handle is prepared from the wood of
Wood of Dalbergia consists of
Youngest heartwood is found.
Wood with specific gravity of less than $0.05$ occurs in ___________.
Hardness of woody tissue is due to
In those plants whose pulp is of economical importance,
they are generally propagated by vegetative means because
An important step in the manufacture of pulp for paper industry from the woody tissues of plants is the -
Timber is
The commercial catch is obtained from the heart wood of
Wood with vessels of unequal diameter and with the largest vessels localized in the early wood is called.
Which of the following is incorrect statement?
Which of the following is incorrect statement?
Select the correct option:
(ii) It is also called alburnum.
(iii) It is light in colour and is very soft.
(iv) It has tracheary elements which are filled with tannins, resins, etc.
Select the correct option:
Select the correct fill ups for the above paragraph.
Central resin-clogged secondary xylem is?
Alternate name of heart wood is
Each annual ring or growth ring consists of two strips of.
A cut trunk shows $26$ concentric rings of spring wood and autumn wood in alternate rows. The age of trunk would be.
Select the correct pair
Which of the following is not correct?
Older resin-clogged central secondary xylem and younger outer secondary xylem are respectively known as
Gymnosperms are soft-wooded as they lack
Amount of secondary xylem as compared to secondary phloem formed every year is
Heteroxylous wood occurs in
Select the correct option:
(i) Lateral roots develop from pericycle
(ii) Endodermis is the innermost layer of cortex
(iii) Sapwood is the central, dark coloured, non-conducting part of secondary xylem
Early wood differs from latewood in