Leptome is used for?(a) Phloem(b) Xylem(c) Fibers(d) Parenchyma

The correct answer is (a) Phloem.
Detailed Explanation:
The term "Leptome" refers to the phloem, which is the tissue responsible for the transport of nutrients and organic compounds, primarily sugars (produced by photosynthesis), throughout a plant. The phloem is part of the plant's vascular system, working in coordination with the xylem to distribute materials across the plant.
• Phloem (Leptome):
o The phloem consists of several types of cells, including sieve tube elements, companion cells, phloem fibers, and phloem parenchyma. Its primary function is to transport the products of photosynthesis (mainly sugars like sucrose) from the leaves (where they are produced) to other parts of the plant.
o In many plants, the phloem is also involved in transporting other organic molecules, such as amino acids and hormones.
• Xylem:
o The xylem is the tissue responsible for the upward transport of water and minerals from the roots to the rest of the plant. The term "leptome" is not used to refer to xylem.
• Fibers:
o Fibers are a type of supporting cell found in plants, and they provide structural support. They are not specifically associated with the term "leptome."
• Parenchyma:
o Parenchyma is a type of ground tissue that consists of living cells and is involved in functions like storage, photosynthesis, and tissue repair. It does not correspond to the term "leptome."
The term Leptome refers to the phloem tissue in plants, which is responsible for the transport of organic substances like sugars. Therefore, the correct answer is (a) Phloem.