A) a mucilage canal
B) a large sized vessel
C) lysigenous water cavity
D) metaxylem
Correct Answer: C
Solution :
The lacunae (an air space in midest of the tissue) in vascular bundle of monocot stem is lysogenous water cavity present in protoxylem (1st formed xylem). A mucilage canal contains mucilage. It is a polysaccharide, which is present in cell wall of aquatic plants and in the seed coats of certain other species. Metaxylem is the part of the primary xylem that develops, in plant after the stem or other part has finished elongating. The walls of the metaxylem are more extensively lignified than those of the protoxylem.
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