Question

define the following

Answer 1

b) casparian strips..
In plant anatomy, the Casparian strip is a band of cell wall material deposited in the radial and transverse walls of the endodermis, and is chemically different from the rest of the cell wall - the cell wall being made of lignin[1]and without suberin - whereas the Casparian strip is made of suberin and sometimes lignin.....
....
a) sap wood. ..
the soft outer layers of recently formed wood between the heartwood and the bark, containing the functioning vascular tissue......
.....
c) periderm. ..
the corky outer layer of a plant stem formed in secondary thickening or as a response to injury or infection....
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Answer 2

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➬ casparian strips

• In plant anatomy, the Casparian strip is a band of cell wall material deposited in the radial and transverse walls of the endodermis, and is chemically different from the rest of the cell wall - the cell wall being made of lignin and without suberin - whereas the Casparian strip is made of suberin and sometimes lignin.

➬sap wood

• the soft outer layers of recently formed wood between the heartwood and the bark, containing the functioning vascular tissue.

➬periderm

• the corky outer layer of a plant stem formed in secondary thickening or as a response to injury or infection