NCERT Important Questions Class 9 Science biology Chapter 5
Important NCERT Extra Questions
Chapter 5 The Fundamental Unit of Life
NCERT Book Extra Questions for Session 2022-2023
CBSE Board and UP Board Others state Board
What are consequences of the following conditions? (a) A cell having higher water concentration than the surrounding medium. (b) A cell containing low water concentration than the surround medium. (c) A cell having equal water concentration to its surrounding medium.
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High water concentration occurs in hypotonic solution, low water concentration in hypertonic solution while equal water concentration in isotonic solution.
(a) A cell having higher water content or hypotonic cell sap will undergo exosmosis and, therefore, lose water. It may undergo plasmolysis.
(b) A cell having low water concentration or hypertonic cell sap will undergo endosmosis and absorb water from outside. It would become turgid.
(c) A cell having isotonic cell sap will neither gain nor lose water to the external medium.