Mention any two secondary sexual characteristics in a 15-year-old boy.

Give the biological term for the surgical method of contraception in human females.

Name the following: (i) The organelle that forms the aster during cell division. (ii) A genetic disorder in which the blood does not clot. (iii) The permanent stoppage of menstruation in human females around the age of 45 years. (iv) The openings on the barks of trees through which transpiration occurs. (v) A gaseous plant hormone which promotes ripening of fruits.

Differentiate between the functions of Urethra and Uterus.

State the exact location of the following structures: (a) Thyroid gland (b) Dura mater (c) Amniotic fluid (d) Papillary muscles (e) Islets of Langerhans

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 any two functions of the human foetal placenta.

Mention any two functions of amniotic fluid.

Choose the odd one out from the following terms and name the category to which the others belong: (a) Used bandages, Pesticides, Face masks, Syringes. (b) Dust, Smoke, Carbon monoxide, Effluents (c) Uterus, Urethra, Urinary bladder, Ureter (d) Menstrual phase, Telophase, Follicular phase, Luteal phase (e) Malleus, Incus, Cochlea, Stapes

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

Given below is the diagram of a human sperm. Read the information below the diagram and fill in the blanks: Living organisms reproduce to form new individuals of their own kind. This is essential for the survival and continuation of species. Human sperms are microscopic structures that carry genetic material. The head of the sperm has a cap like organelle called (a) ............... (Lysosome / Acrosome) which produces an enzyme (b) ............... (Hyaluronidase / Amylase) that dissolves the outer layer of the ovum to facilitate fertilisation. The nucleus of the sperm has (c) ............... (23 / 46) chromosomes. The middle piece has (d) ............... (Chloroplast / Mitochondria) to provide energy for the motility of the sperm. (e) ............... (Semen / Hymen) is a mixture of sperms and the fluids produced by the male accessory glands.

Give the biological/technical terms for the following: (a) The tropic movement wherein the tendrils of a pea plant twine around a support. (b) A defect in our eye in which some parts of the object are in focus while the other parts are blurred. (c) The type of waste generated in hospitals and pathological laboratories. (d) The surgical technique for females that can be used to prevent pregnancy. (e) The evolutionary process by which new species arise from the existing one.