Question

The xylem in plants are responsible for
A) Transport of water
B) Transport of food
C) Transport of amino acids
D) Transport of oxygen

Answer 1

Hint:Xylem is one of the two levels of transport tissue in vascular plants, phloem being the other. Xylem is the particular tissue of vascular plants that carries nutrients from the plant–soil interface to leaves and stems, and gives mechanical assistance and storage.

Complete answer:
Let us analyse the given options to find out the correct answer.
>Option A: Xylem tissues comprise vessels, tracheids, parenchyma and fibers and assist in the rise of sap/water and minerals. Therefore this is the correct option.
>Option B: Phloem tissues is formulated of four components namely, sieve elements, partner cell, phloem parenchyma and phloem fibers and serve in translocation of organic compounds. Therefore this is an incorrect option.
>Option C: Transfer RNA (tRNA) assists as transportation RNA and carries amino acids from the cell pool to the mRNA end to the ribosome where the protein is being produced. Therefore this is an incorrect option.
>Option D: The Haemoglobin molecule comprises four polypeptide chains and four heme prosthetic factions. It fulfills as a transportation of oxygen gas. Therefore this is an incorrect option.

Additional information: In most woody plants, xylem grows by the differentiation and division of cells of a bifacial lateral meristem, the vascular cambium, which generates secondary xylem and phloem.
Xylem is timber, one of the world's most substantial and useful renewable raw materials.

Thus, option A is the correct answer.

Note:
i) Xylem plays an important ‘supporting’ role furnishing stability to tissues and organs, to conserve plant architecture and opposition to bending.
ii) The water‐transporting cells of mature xylem are extinct, and therefore the carrier of water is largely a modest process with a very tiny active root pressure element.