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Short Tricks: Transport in Plants Video Lecture | Tips & Tricks for NEET

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1. What is the process of transport in plants?
Ans. Transport in plants refers to the movement of water, minerals, and nutrients throughout the plant's vascular system. It occurs through two main processes: transpiration and translocation. Transpiration is the loss of water vapor from the plant's leaves through tiny pores called stomata. Translocation, on the other hand, is the movement of sugars and other organic molecules from the leaves to other parts of the plant through the phloem.
2. How does water move in plants?
Ans. Water moves in plants through a process called transpiration. Transpiration occurs when water evaporates from the plant's leaves through stomata. This evaporation creates a negative pressure, or tension, that pulls water up from the roots through the xylem vessels. This process is known as the cohesion-tension theory. Additionally, the root hairs in the plant's roots also play a role in absorbing water from the soil and facilitating its movement upwards.
3. What are the two types of vascular tissues in plants?
Ans. The two types of vascular tissues in plants are xylem and phloem. Xylem is responsible for the transport of water, minerals, and nutrients from the roots to the rest of the plant. It consists of specialized cells called tracheids and vessel elements. Phloem, on the other hand, transports sugars and other organic molecules from the leaves to other parts of the plant. It contains sieve tube elements and companion cells.
4. How does translocation occur in plants?
Ans. Translocation in plants occurs through the phloem tissue. It involves the movement of sugars and other organic molecules from the source, usually the leaves, to the sink, which can be any part of the plant that requires these nutrients, such as fruits or roots. The process is facilitated by pressure flow mechanism. Sugars are actively loaded into sieve tube elements in the source region, creating a high concentration of solutes. This creates a pressure gradient, causing the sugars to flow towards the sink region where they are unloaded and utilized.
5. What are the factors affecting transpiration in plants?
Ans. Several factors can affect the rate of transpiration in plants. These include: - Temperature: Higher temperatures generally increase transpiration rate as it enhances evaporation. - Humidity: High humidity reduces the transpiration rate as the air is already saturated with moisture. - Wind: Increased air movement enhances transpiration by carrying away water vapor from the leaf surface. - Light: Intense light can increase transpiration rate due to increased stomatal opening for photosynthesis. - Soil moisture: Plants close their stomata to prevent excessive water loss when soil moisture is low, reducing transpiration.
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