Here, you'll find important questions related to Chapter 3 : Absorption by Roots- The Processes Involved for ICSE Class 10 Biology. These questions have been crafted to assist students in their preparation for the ICSE Class 10 Biology Examination in 2023–24. By practising various question types, students can clarify their doubts, enhance their exam readiness, boost their confidence, and refine their problem-solving skills.
In the third chapter of ICSE Class 10 Biology, we embark on a fascinating journey into the intricate world of "Absorption by Roots - The Processes Involved." This chapter delves into the fundamental processes by which roots of plants absorb water and nutrients from the soil, a crucial aspect of a plant's survival and growth. To master this subject, students not only need a solid understanding of the concepts but also comprehensive practice with biology questions for Class 10 ICSE.
In this chapter, we will unravel the mysteries behind root absorption mechanisms, exploring how plants utilise various structures and processes to uptake essential substances. Additionally, we will delve into the intricacies of osmosis, diffusion, and active transport—concepts that are vital to comprehending the intricate world of plant physiology. As you navigate through this chapter, you'll find valuable insights and a thorough exploration of important questions for Class 10 biology ICSE, enabling you to strengthen your knowledge and prepare effectively for your examinations. So, let's delve into the absorbing world of root processes and equip ourselves with the essential tools to understand the life of plants at a cellular level.
Absorption by Roots - The Processes Involved refers to the mechanisms and physiological processes through which plant roots uptake water, minerals, and nutrients from the soil. This vital function is essential for a plant's growth, development, and overall survival. Several key processes are involved in root absorption:
Understanding these processes is essential for students studying ICSE Class 10 Biology, as they provide insights into how plants efficiently extract essential resources from their environment. Moreover, practising important questions for Class 10 ICSE biology related to root absorption processes can help reinforce and apply this knowledge effectively.
The movement of water molecules inside the cell stops when the solution becomes isotonic with respect to the surrounding solution. Isotonic refers to an equal concentration of both solute and solvent.
Ans. (d) Cytoplasm and cell membrane
In order to function, cells are required to move materials in and out of their cytoplasm via their cell membranes. Therefore cytoplasm and cell membrane is an important requirement.
Drops of water on a leaf of a plant like peepal does not enter the leaf by osmosis due to the presence of cuticle, which does not allow water molecules to pass through it.
Water potential is a measure of potential energy of water per unit volume or the difference in potential energy between a given water sample and pure water.
The understanding of absorption by roots and the processes involved is vital in comprehending how plants acquire essential nutrients and water from the soil..For students aspiring to excel in this aspect of biology and reinforce their knowledge, exploring additional ICSE Class 10 biology questions related to absorption by roots is highly recommended. If you seek additional practice and wish to enhance your understanding of the chapter's content, Oswal.io provides a comprehensive collection of questions to facilitate your learning process.
Ans: As the water is lost from the leaf surface by transpiration, more water molecules are pulled up due to the tendency of water molecules to remain joined (cohesion), and thus to produce a continuous column of water through the stem is called transpiration pull. Transpiration pull is an important force which causes the ascent of sap. Negative pressure or tension is produced in the xylem that pulls the water from the roots and soil.
Ans: The rapid drooping of the leaves of the sensitive plant (Mimosa pudica) is an outstanding example of turgor movement. If one of the leaves is touched, even lightly, the leaflets fold up and within 2 to 3 seconds, the entire leaf droops. If the leaf is touched somewhat strongly, the wave of folding and drooping spreads from the stimulated leaf to all neighbouring leaves. Slowly, the leaves recover and again stand erect. In this plant, the stimulus of touch leads to loss of turgor at the base of petioles called a pulvinus.
Ans: Imbibition is the passive absorption of water by substances such as cellulose (in the cell wall) and starch. Turgor is the pressure set up inside the plant cells due to hydrostatic pressure on the cell walls on account of incoming water as a result of endosmosis. The seeds swell up when soaked in water due to imbibition and endosmosis. The force generated by the water thus absorbed is strong enough to make the seed coats burst. Hence, soaked seeds when kept in a fully filled closed container burst it open with pressure.
Ans: The concentration of mineral nutrient elements is higher inside the root-hairs than in the surrounding soil because the absorption of mineral elements from the soil involves active transport by the cells. Minerals may also be absorbed as ions rather than as salts. The dilute solution of water and mineral salts, absorbed from the soil by the roots, can be used for food manufacture in the leaves, only if it can travel up to the highest points of the plant. This upward flow occurs through the xylem.
Ans: Mimosa pudica is an outstanding example of turgor movement. The rapid dropping of the leaves of the sensitive plants. If one of the leaves is touched, even lightly, the leaflets fold up and within 2 to 3 seconds, the entire leaf droops. If the leaf is touched somewhat strongly, the wave of folding and drooping spreads from the stimulated leaf to all neighbouring leaves.Similar turgor movements are found in insectivorous plants whose leaves close up to entrap a living prey. The bending movement of certain flowers towards the sun and the sleep movements of the leaves of certain plants at night are also due to turgor movements.