Question

Plants have phloem give reasons​

Answer 1

Answer:

Abstract

Phloem is the vascular tissue in charge of transport and distribution of the organic nutrients. The phloem is also a pathway to signaling molecules and has a structural function in the plant body. It is typically composed of three cell types: sieve elements, parenchyma, and sclerenchyma. The sieve elements have the main function of transport and typically have lost their nuclei and other organelles in the course of their specialization. Hence, the sieve elements rely on specialized neighboring parenchyma cells to sustain all of their physiological function and activities. All cell types of the phloem may vary morphologically and in their distribution in the tissue, and this diversity is taxonomic and functionally informative. The phloem can be of primary or secondary origin, being derived from either procambium or cambium, respectively. Some vascular plant lineages have exclusive primary phloem, such as the lycophytes, ferns, and the monocotyledons, and the sieve elements will be long living in these taxa. In plants with secondary growth, the secondary phloem is formed, and typically the primary phloem collapses. Because new secondary phloem is constantly formed, the longevity of sieve elements in the secondary plant body is much more reduced. In this chapter, the structure of the phloem and its cell types are described in detail and also some of the known commercial uses of this tissue.

Answer 2

• Phloem, also known as blast, are plant tissues that transport nutrients from the leaves to the rest of the plant.
• Sieve tubes, companion cells, phloem fibers, and phloem parenchyma cells are all types of specialized cells that make up phloem.
• The apical meristems  of root and shoot tips create primary phloem, which can be either protophloem or metaphloem, depending on whether the cells mature before or after elongation (growth) of the region in which it sits.
• Protophloem sieve tubes are unable to extend with the elongating tissues, and as the plant becomes older, they are ripped and destroyed.
• The phloem's other cell types might be transformed to fibers as well.