Question

Sieve tubes are associated with_ _ _ _ _ _ _ .
A.Xylem tissue
B.Cambium
C.Phloem
D.Cortex

Answer 1

Hint: In flowering plants Sieve tube is elongated living cells present in the phloem, the nuclei of these cells have fragmented and disappeared, and the transverse end walls of which are pierced by sieve-like groups of pores (sieve plates). They transport food which is mostly sugar.

Complete step by step answer:
(A). Xylem is a part of plant vascular tissue that conveys water and dissolved minerals from the roots to the rest of the plant and also provides physical support. Xylem tissue consists of a variety of specialized cells and water-conducting cells which is called tracheary elements.
(B). A cambium is a tissue layer that provides partially undifferentiated cells for plant growth. It is found in the area between xylem and phloem. It forms parallel rows of cells, which result in secondary tissue formation. In the plural, state cambium is called cambia or cambiums.
(C). Phloem is also called bast. The phloem is the tissue in plants that transport food made in the leaves to all other parts of the plant. Phloem is composed of various specialized cells like sieve tubes, companion cells, phloem fibers, and phloem parenchyma cells.
(D). Cortex, in plants, the tissue of unspecialized cells lying between the epidermis (surface cells) and the vascular, or conducting, tissues of stems and roots. The stored carbohydrates and other substances like resins, latex, essential oils, and tannins are present in Cortical cells.
Hence, the correct option is C that is Phloem.

Note: Xylem is a part of plant vascular tissue that conveys water and dissolved minerals from the roots to the rest of the plant. Cambium provides partially undifferentiated cells for plant growth. Phloem is the tissue in plants that conduct foods made in the leaves to all other parts of the plant.