Assertion (A): A turgid plant cell is in a balanced state.
Reason (R): In a turgid cell, turgor pressure and wall pressure are equal and in the same direction.
(a) A is True and R is False
(b) A is False and R is True
(c) Both A and R are True
(d) Both A and R are False
(a) A is True and R is False
Explanation: Turgor pressure pushes outward while wall pressure pushes inward. They are equal in magnitude but act in opposite directions, balancing each other.
More ICSE Moderate level questions
Varun's mother added plenty of salt to the mango pickle she made. This is to: A. enhance the colour of the pickle. B. inhibit the growth of microorganisms. C. increase the nutritional value. D. create a hypertonic solution. (a) A and C (b) B and C (c) C and D (d) B and D
Name the following: (a) Unicellular outgrowths of the epidermis of roots. (b) The defect of the eye in which some parts of an object are focused while other parts appear blurred. (c) The tropic movement in response to chemicals. (d) The main nitrogenous waste in the human body. (e) The attachment of the fertilized ovum to the wall of the uterus.
Given below is the diagram of a plasmolysed cortical cell of a root. Copy the diagram and label the following parts: (a) Cytoplasm (b) Hypertonic solution (c) Plasma membrane
Given below is a picture of a tree. Mention the scientific phenomena occurring in the parts labelled (a), (b) and (c).
Deplasmolysis occurs when a plasmolysed cell is placed in: (a) Concentrated salt solution (b) Tap water (c) Concentrated sugar solution (d) Hypertonic salt solution
Osmosis involves the movement of water molecules through a: (a) Freely permeable membrane (b) Cell wall (c) Selectively permeable membrane (d) Impermeable membrane
What is a semi permeable membrane? Name the semi permeable membrane present in a plant cell.
What is Active transport?
Arrange and rewrite the terms in each group in correct order to be in a logical sequence beginning with the term that is underlined: (a) Snake, Rabbit, Cabbage, Hawk. (b) Xylem, Soil water, Cortical cells, Root hair. (c) Receptor, Response, Effector, Spinal Cord. (d) Fovea, Lens, Cornea, Conjunctiva. (e) Testis, Urethra, Sperm duct, Epididymis.
Mention two adaptations in roots for absorption of water from the soil.
Assertion (A): Seminal vesicles pour an alkaline secretion into the semen as it passes through the ureter. Reason (R): The female vagina is acidic and needs to be neutralized for sperm survival. (a) A is True and R is False (b) A is False and R is True (c) Both A and R are True (d) Both A and R are False
Assertion (A): Deficiency of Antidiuretic hormone causes an increase in urination. Reason (R): Antidiuretic hormone acts on the kidney to reabsorb water from the kidney tubules. (a) A is True and R is False (b) A is False and R is True (c) Both A and R are True (d) Both A and R are False
