A) lysigenous cavity
B) lysogenous cavity
C) shizogenous cavity
D) shizolysigenous cavity
Correct Answer: C
Solution :
Schizogenous (Schizein, to split) cavities are formed by the splitting up of common walls and the separation of masses of cells from one another. Inter-cellular spaces and these cavities form an intercommunicating system so that gases and liquids can easily diffuse from one part of the plant body to the other. Most resin-ducts in plants especially gymnosperms, oil ducts (sunflower) are schizogenous cavities. Lysigenous (lysis, loosening) cavities are formed by breaking down and dissolving off the walls, during the development of a mass of cells. As a consequence, large irregular cavities appear, known as lysigenous. They are meant for storing water, gases, essential oils etc. and thus acts as glands. Schizolysigenous cavities are formed by both separation and degeneration of cells, e.g., Protoxylem cavity of maize stem.
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