In the context of the Sangam age of South India, the term 'Sangam' refers to ______.
Show answer & explanation
Correct answer: D
Explanation
Plants don't have a complex system for excreting waste like humans do. They store or discard their waste in a variety of ways, one of the main ways being by storing it in old xylem.
Plant Waste and Old Xylem -
As trees age, the center of their trunk (called heartwood) stops conducting water. This part is composed primarily of dead xylem tissue.
Resins: These are sticky substances often found in conifers like pines. Plants store them in their old xylem.
Gum: This is also a metabolic byproduct of plants that is stored in old xylem cells.