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Xylem & Phloem : Tissues - Science, Class 9 Video Lecture

FAQs on Xylem & Phloem : Tissues - Science, Class 9 Video Lecture

1. What are xylem and phloem?
Ans. Xylem and phloem are two types of plant tissues responsible for the transportation of water, nutrients, and sugars throughout the plant. Xylem transports water and minerals from the roots to the leaves, while phloem transports sugars and other organic compounds from the leaves to other parts of the plant.
2. How are xylem and phloem different from each other?
Ans. Xylem and phloem differ in their structure and function. Xylem is composed of dead cells and forms a continuous network of tubes that transport water and minerals. In contrast, phloem is made up of living cells and transports sugars and other organic compounds. Xylem transports substances in one direction (upwards), while phloem transports substances bidirectionally (upwards and downwards).
3. What is the role of xylem in plants?
Ans. Xylem plays a crucial role in plants by conducting water and minerals from the roots to the leaves. It provides structural support to the plant and helps in maintaining turgidity. Xylem also helps in the transportation of hormones and other signaling molecules throughout the plant.
4. How does phloem contribute to plant growth and development?
Ans. Phloem is responsible for the transportation of sugars and other organic compounds produced during photosynthesis from the leaves to other parts of the plant. These sugars are important sources of energy for growth and development. Phloem also transports hormones and other signaling molecules, which regulate various physiological processes in plants.
5. What happens if there is a disruption in the functioning of xylem and phloem?
Ans. Disruption in the functioning of xylem and phloem can have detrimental effects on plant growth and survival. If xylem is damaged or blocked, water and nutrient uptake by the plant will be affected, leading to wilting and nutrient deficiencies. Similarly, disruption in phloem can hinder the transportation of sugars, resulting in stunted growth, reduced fruit production, and overall plant weakness.
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