Question

Biological check post in roots of angiosperm is 1) Pericycle 2) Endodermis 3) Bulliform cells 3) Starch sheath​

Answer 1

Answer:

endodermis

Explanation:

Casperian strip of endodermis act as biological check post in root .

Answer 2

The correct answer is 2) Endodermis.

Explanation:

• The Endodermis is a layer of cells is located in between the cortex and the pericycle of the roots.
• The layer is interspersed by specialised cells that form the Casparian strip.
• The Casparian strips have lignin deposition in their cell wall which prevents the apoplastic movement (through the cell wall) of water.
• Hence, with the help of Casparian strips the endodermis is capable of restricting or selectively allowing the movement of water, ions and other components into or out of the plant vascular system.
• Therefore, it acts as a checkpost.