Write the term for the pressure exerted by the cell contents on the cell wall.

Differentiate between Plasmolysis and Deplasmolysis.

Copy the diagram given below. (a) Name the structure. (b) Label Gray matter and White matter.

Tara's grandmother is 70 years old and has a passion for embroidery. She faces difficulty in threading the needle as the eye of the needle appears blurred. The ophthalmologist diagnosed it as an age-related disorder. (a) Name the defect. (b) How can it be corrected? (c) Where is the image formed in this defect?

Draw a neat, labelled diagram of an animal cell showing the Prophase stage of Mitosis with four chromosomes.

Rajat Singh was working as a supervisor in a stone quarry where rock, sand and gravel are extracted by techniques like digging, drilling and blasting. As the years rolled by, Rajat started facing a loss in hearing. The high decibel sounds had damaged a part of his internal ear, though the tympanic membrane was intact. (a) What is the collective term for the structures of the internal ear? (b) Name the sensory organ in the cochlea that was damaged. (c) Name the type of pollution responsible for this condition.

Akshay's father had a tumour in his prostate gland. His doctor advised him to get it removed surgically. One side effect of the surgery was incontinence of urine, i.e., leakage of urine from the urinary bladder. (a) Where is the prostate gland located? (b) Why does the prostate gland produce an alkaline secretion? (c) Name the structure regulating the flow of urine from the bladder into the urethra.

A sequence of DNA has 300 nitrogenous base pairs, of which 75 are Guanine. What is the number of Thymine in this sequence? (a) 150 (b) 100 (c) 50 (d) 75

Karan was standing on a high stool and cleaning the ceiling fan. He suddenly loses balance and sustains a head injury. An examination reveals that his pupils have lost the capacity to constrict in bright light. Which structure has been damaged? (a) Suspensory ligaments (b) Medulla oblongata (c) Eye lens (d) Eye lid

“Vanishing Greenery; A Growing Urban Crisis” In most of our cities, rapid urbanisation has led to a significant decrease in greenery over the past two decades. As the population increased, the demand for housing, roads and commercial buildings grew, leading to clearing of parks, gardens and natural resources. This has contributed to several problems. (a) Mention one problem caused by the decrease in greenery. (b) How do green plants improve air quality? (c) What role can citizens play in addressing this problem?

Choose the odd one out from the following terms and name the category to which the others belong: (a) Auxin, Oxytocin, Gibberellin, Cytokinin (b) Growth Hormone, Vasopressin, Thyroid Stimulating Hormone, Gonadotropic Hormone (c) Urochrome, Urea, Uric acid, Nucleic acid (d) Cervix, Chordae Tendinea, Papillary Muscles, Sinoatrial node (e) Morula, Blastocyst, Oviduct, Foetus

Assertion (A): Abscisic acid promotes stomatal closure during a drought. Reason (R): Abscisic acid helps the plant to conserve water during stress. (a) (A) is true and (R) is false (b) (A) is false and (R) is true (c) Both (A) and (R) are true and (R) is the correct explanation of (A). (d) Both (A) and (R) are true and (R) is not the correct explanation of (A).