Question

Sieve tube is
(1) Multicellular, vessel like structure
(2) Provided with porous septa
>
(3)
The main conducting elements for
translocation of food
(4) All of the above​

Answer 1

Explanation:

It has the highest thermal and electrical conductivities of all metals. It is generally found uncombined, or in the sulphide or arsenide ores from which it can be recovered as a cyanide complex which is subsequently reduced to the metal, in aqueous solution, by the use of zinc.

Answer 2

Option 4 is the correct answer.

• The sieve tube is the conducting ingredient of the phloem. It is constructed from a vertical procession of extended cells, interconnected by punctures in their sides in regions understood as sieve plates. The openings may be prohibited to minor regions, and sieve fields, various of which are comprised in each sieve plate.
• The fundamental purposes of sieve tube units comprise retaining cells and transferring essential molecules with the assistance of companion cells. The sieve tube units are living cells that are accountable for transferring carbohydrates throughout every part of the plant.

Hence, option D all of the above are the correct answer.

#SPJ2