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Biology NEET - XI: Chapter 6- Anatomy of Flowering Plants Part 6

Biology25 CardsCreated about 2 months ago

This deck covers key concepts from Chapter 6, focusing on the anatomy of flowering plants, including wood types, meristems, xylem, and phloem.

What is alburnum?

Sap wood
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Key Terms

Term
Definition
What is alburnum?
Sap wood
What is duramen?
Heart wood
What is lighter in colour: sapwood or heartwood?
Sapwood
Tracheary elements are plugged by tyloses in heartwood or sapwood?
Heartwood
What is lighter in weight- sapwood/heartwood?
Sapwood
What is soft wood?
Gymnosperm wood

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TermDefinition
What is alburnum?
Sap wood
What is duramen?
Heart wood
What is lighter in colour: sapwood or heartwood?
Sapwood
Tracheary elements are plugged by tyloses in heartwood or sapwood?
Heartwood
What is lighter in weight- sapwood/heartwood?
Sapwood
What is soft wood?
Gymnosperm wood
What is non porous wood?
Gymnosperm wood
Are xylem fibres abundant in softwood or hardwood?
Hard wood
What are tyloses?
Ingrowth of adjacent parenchymatous cells into xylem vessels.
Heartwood is absent in which dicot?
Poplar and willow
Which meristem occurs between mature tissues?
Intercalary meristem
Name a cylindrical meristem.
Lateral meristem
Examples of lateral meristems are
Fascicular and interfascicular meristem
Which simple tissue is found in patches in plants?
Collenchyma
What are the two main functions of xylem?
Conduction of water and minerals, providing mechanical support to plants
The thickenings of cell walls of tracheids are even. True/false?
False. They vary in form.
Tracheids are connected with each through interperforations in their walls. True/false?
False. Vessels are connected with each through interperforations in their walls.
Name the lignified tracheary element with wide cavity.
Vessels
Do xylem fibres have septa?
Xylem fibres maybe septate or aseptate.
Which cells in xylem are living?
Xylem parenchyma
In which form are food materials stored in xylem parenchyma?
Starch or fat
What is meant by endarch xylem?
Protoxylem lies towards the centre of the pit and metaxylem towards the periphery.
How are companion cells and seive tube elements connected?
Through pit fields in their common longitudinal walls.
What is the function of companion cells?
The companion cells help in maintaining pressure gradients in the seive tube elements.
What is the shape of the cells present in phloem parenchyma?
Elongated, tapering cylindrical cells which have dense cytoplasm and a nucleus