Phloem Tissue Components Explained
Phloem tissue is one of the two types of transport tissue in vascular plants, distinguished from xylem. It transports sugars produced during photosynthesis from the leaves to other parts of the plant.
Key Components of Phloem
The main components that make up phloem tissue include:
- Sieve elements (sieve cells and sieve-tube elements): Responsible for conduction.
- Companion cells: Provide metabolic support to sieve elements.
- Phloem parenchyma: Involved in storage and loading/unloading of sugars.
- Phloem fibres: Provide structural support.
Analyzing the Options
Evaluating the provided options to identify a phloem component:
- Sieve tubes: These are formed by sieve-tube elements and are the primary conducting structures in the phloem. This is a correct component of phloem.
- Tracheids: These are elongated cells that are part of the xylem, aiding in water transport.
- Xylem fibres: These provide structural support to the xylem tissue.
- Vessels: These form continuous tubes within the xylem for efficient water transport.
Therefore, sieve tubes are a component of phloem tissue.
Important Questions from Biology
Which of the following statements about living and non-living being is/are correct?
1. While living being can demonstrate growth and repair, non-living being cannot.
2. While living being demonstrates metabolic processes, non-living being does not.
Select the correct answer using the code given below.Movement of materials to different parts of cytoplasm and nucleus is generally carried out by
The gaseous product of a process in plants is a requirement for another vital process that releases energy. Given below are four combinations of the process and product. Identify the correct answer.
Which one of the following cell organelles may play a role in expelling excess water and wastes in case of unicellular organisms?
Transformation of meristematic cells into specific permanent tissues occurs by the process of
