271881
Select the correct pair amongst the following.
1 Spring wood-light colour, high density
2 Spring wood-dark colour, low density
3 Autumn wood-light colour, high density
4 Autumn wood-dark colour, high density
Explanation:
Exp:D Based on the influence of various physiological condition and environmental factors the two types of wood formed are: - 1.Autumn wood (Late wood) - The wood formed in the winter season is called autumn wood. It is dark color wood with high density. It contains compactly arranged smaller and narrower elements which have comparatively thicker walls. In autumn wood, tracheids and fibers are more abundant than those found in the spring wood. 2.Spring wood (Early wood) - The wood formed in spring season is called spring wood. It is light colour wood and with low density. Spring wood consists of larger and wider xylem elements.
AIIMS-2013
Anatomy of Flowering Plants
271882
Porous wood contains :-
1 Vessels
2 Fibres only
3 Tracheids
4 Sieve tubes.
Explanation:
Exp:A Vessels are joined end to end to form continuous tubular structures with perforations in their cross walls. Water and minerals are efficiently conducted through these perforations. Vessels are present in most of the angiosperms. Hence, the wood can be termed as porous due to these perforations. - Porous wood is the dicotyledonous wood that contains abundant vessels. Porous wood can be ring porous or diffuse porous. - In ring porous wood, vessels are very broad in spring wood and are quite narrow in the autumn wood. Eg. Dalbergia sisoo, and Cassia fistula.
AIIMS-2001
Anatomy of Flowering Plants
271884
The trees growing in temperature regions show clear demarcation between spring wood and autumn wood. This is because
1 The water stress is more
2 The climatic conditions are not uniform throughout the year
3 The climatic conditions are uniform throughout the year
4 The temperature is high
Explanation:
Exp:B The climatic conditions are not uniform throughout the year. - It causes to show clear demarcation between spring wood and autumn wood.
Karnataka CET-2019
Anatomy of Flowering Plants
271885
Casparian bands are found in
1 Endodermis
2 Pericycle
3 Periderm
4 Cortex
Explanation:
Exp:A Casparian bands are found in 'endodermis. - Casparian strips are usually present in the endodermis. It is a cell wall material that is present in the radial and transverse walls of the endodermis of roots.
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Anatomy of Flowering Plants
271881
Select the correct pair amongst the following.
1 Spring wood-light colour, high density
2 Spring wood-dark colour, low density
3 Autumn wood-light colour, high density
4 Autumn wood-dark colour, high density
Explanation:
Exp:D Based on the influence of various physiological condition and environmental factors the two types of wood formed are: - 1.Autumn wood (Late wood) - The wood formed in the winter season is called autumn wood. It is dark color wood with high density. It contains compactly arranged smaller and narrower elements which have comparatively thicker walls. In autumn wood, tracheids and fibers are more abundant than those found in the spring wood. 2.Spring wood (Early wood) - The wood formed in spring season is called spring wood. It is light colour wood and with low density. Spring wood consists of larger and wider xylem elements.
AIIMS-2013
Anatomy of Flowering Plants
271882
Porous wood contains :-
1 Vessels
2 Fibres only
3 Tracheids
4 Sieve tubes.
Explanation:
Exp:A Vessels are joined end to end to form continuous tubular structures with perforations in their cross walls. Water and minerals are efficiently conducted through these perforations. Vessels are present in most of the angiosperms. Hence, the wood can be termed as porous due to these perforations. - Porous wood is the dicotyledonous wood that contains abundant vessels. Porous wood can be ring porous or diffuse porous. - In ring porous wood, vessels are very broad in spring wood and are quite narrow in the autumn wood. Eg. Dalbergia sisoo, and Cassia fistula.
AIIMS-2001
Anatomy of Flowering Plants
271884
The trees growing in temperature regions show clear demarcation between spring wood and autumn wood. This is because
1 The water stress is more
2 The climatic conditions are not uniform throughout the year
3 The climatic conditions are uniform throughout the year
4 The temperature is high
Explanation:
Exp:B The climatic conditions are not uniform throughout the year. - It causes to show clear demarcation between spring wood and autumn wood.
Karnataka CET-2019
Anatomy of Flowering Plants
271885
Casparian bands are found in
1 Endodermis
2 Pericycle
3 Periderm
4 Cortex
Explanation:
Exp:A Casparian bands are found in 'endodermis. - Casparian strips are usually present in the endodermis. It is a cell wall material that is present in the radial and transverse walls of the endodermis of roots.
271881
Select the correct pair amongst the following.
1 Spring wood-light colour, high density
2 Spring wood-dark colour, low density
3 Autumn wood-light colour, high density
4 Autumn wood-dark colour, high density
Explanation:
Exp:D Based on the influence of various physiological condition and environmental factors the two types of wood formed are: - 1.Autumn wood (Late wood) - The wood formed in the winter season is called autumn wood. It is dark color wood with high density. It contains compactly arranged smaller and narrower elements which have comparatively thicker walls. In autumn wood, tracheids and fibers are more abundant than those found in the spring wood. 2.Spring wood (Early wood) - The wood formed in spring season is called spring wood. It is light colour wood and with low density. Spring wood consists of larger and wider xylem elements.
AIIMS-2013
Anatomy of Flowering Plants
271882
Porous wood contains :-
1 Vessels
2 Fibres only
3 Tracheids
4 Sieve tubes.
Explanation:
Exp:A Vessels are joined end to end to form continuous tubular structures with perforations in their cross walls. Water and minerals are efficiently conducted through these perforations. Vessels are present in most of the angiosperms. Hence, the wood can be termed as porous due to these perforations. - Porous wood is the dicotyledonous wood that contains abundant vessels. Porous wood can be ring porous or diffuse porous. - In ring porous wood, vessels are very broad in spring wood and are quite narrow in the autumn wood. Eg. Dalbergia sisoo, and Cassia fistula.
AIIMS-2001
Anatomy of Flowering Plants
271884
The trees growing in temperature regions show clear demarcation between spring wood and autumn wood. This is because
1 The water stress is more
2 The climatic conditions are not uniform throughout the year
3 The climatic conditions are uniform throughout the year
4 The temperature is high
Explanation:
Exp:B The climatic conditions are not uniform throughout the year. - It causes to show clear demarcation between spring wood and autumn wood.
Karnataka CET-2019
Anatomy of Flowering Plants
271885
Casparian bands are found in
1 Endodermis
2 Pericycle
3 Periderm
4 Cortex
Explanation:
Exp:A Casparian bands are found in 'endodermis. - Casparian strips are usually present in the endodermis. It is a cell wall material that is present in the radial and transverse walls of the endodermis of roots.
271881
Select the correct pair amongst the following.
1 Spring wood-light colour, high density
2 Spring wood-dark colour, low density
3 Autumn wood-light colour, high density
4 Autumn wood-dark colour, high density
Explanation:
Exp:D Based on the influence of various physiological condition and environmental factors the two types of wood formed are: - 1.Autumn wood (Late wood) - The wood formed in the winter season is called autumn wood. It is dark color wood with high density. It contains compactly arranged smaller and narrower elements which have comparatively thicker walls. In autumn wood, tracheids and fibers are more abundant than those found in the spring wood. 2.Spring wood (Early wood) - The wood formed in spring season is called spring wood. It is light colour wood and with low density. Spring wood consists of larger and wider xylem elements.
AIIMS-2013
Anatomy of Flowering Plants
271882
Porous wood contains :-
1 Vessels
2 Fibres only
3 Tracheids
4 Sieve tubes.
Explanation:
Exp:A Vessels are joined end to end to form continuous tubular structures with perforations in their cross walls. Water and minerals are efficiently conducted through these perforations. Vessels are present in most of the angiosperms. Hence, the wood can be termed as porous due to these perforations. - Porous wood is the dicotyledonous wood that contains abundant vessels. Porous wood can be ring porous or diffuse porous. - In ring porous wood, vessels are very broad in spring wood and are quite narrow in the autumn wood. Eg. Dalbergia sisoo, and Cassia fistula.
AIIMS-2001
Anatomy of Flowering Plants
271884
The trees growing in temperature regions show clear demarcation between spring wood and autumn wood. This is because
1 The water stress is more
2 The climatic conditions are not uniform throughout the year
3 The climatic conditions are uniform throughout the year
4 The temperature is high
Explanation:
Exp:B The climatic conditions are not uniform throughout the year. - It causes to show clear demarcation between spring wood and autumn wood.
Karnataka CET-2019
Anatomy of Flowering Plants
271885
Casparian bands are found in
1 Endodermis
2 Pericycle
3 Periderm
4 Cortex
Explanation:
Exp:A Casparian bands are found in 'endodermis. - Casparian strips are usually present in the endodermis. It is a cell wall material that is present in the radial and transverse walls of the endodermis of roots.
