Question

The resin ducts of gymnosperms are

• A. Lysigenous
• B. Schizogenous
• C. Schizolysigenous
• D. None of the above

Answer 1

The correct option is B Schizogenous

Gymnosperms stems, leaves and cones show presence of resin ducts. The substances from resin ducts seal the damaged surfaces and also possess insect resistant properties.
Resin ducts are present in intercellular spaces formed in plant body. There are 3 types of intercellular spaces namely, lysigenous, schizogenous, schizolysigenous.
Lysigenous intercellular space is formed by dissolution of entire cells. Such intercellular space stores water, gases and essential oils.
Schizogenous intercellular space is formed by separation of cell walls of cells at middle lamella. Such intercellular space shows presence of resin ducts.
Schizolysigenous intercellular space is formed by dissolution of entire cells and separation of middle lamella.
Therefore, the correct answer is option B.