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Answer
(a) -1 (Homo habilis), (b) -3 (Homo erectus), (c) -2 (Australopithecus), (d) -5 (Homo neanderthalensis), (e) -4 (Homo sapiens)
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| Column I | Column II |
| (i) Anaphase | (a) Chromosomes become arranged in a horizontal plane at the equator. |
| (ii) Prophase | (b) Daughter chromosomes move to opposite poles of the spindle. |
| (iii) Telophase | (c) Chromosomes become visible as fine, long threads. |
| (iv) Metaphase | (d) Chromosomes lose their distinctiveness and gradually become transformed into chromatin network. |
| Column I | Column II |
| (i) Implantation | (a) Testosterone |
| (ii) Fertilisation | (b) Vasectomy |
| (iii) Contraception in males | (c) Spermatozoa |
| (iv) Leydig cells | (d) Uterus |
| (e) Fallopian tube |
| Column I | Column II |
| (i) Family Planning | (a) Counting of population |
| (ii) Vasectomy | (b) Sterilisation in females |
| (iii) Tubectomy | (c) Sterilisation in males |
| (iv) Census | (d) Red triangle |
| Column I | Column II |
| (i) Gigantism | (a) Over-secretion of thyroxine. |
| (ii) Cushing's syndrome | (b) Over-secretion of growth hormone in childhood. |
| (iii) Exophthalmic goiter | (c) Over-secretion of cortical hormones. |
| (iv) Acromegaly | (d) Over-secretion of growth hormones in adults. |
| (e) Simulates skeletal growth. |
| Component | Approximate number | Life Span |
| I. RBCs | (A) 7,000 | (i) 3-5 days |
| II. WBCs | (B) 2,50,000 | (ii) 100-120 days |
| III. Blood platelets | (C) 4.8-5-5 million | (iii) 2 weeks |
| Column I | Column II |
| (i) Coronary artery | (a) Largest artery |
| (ii) Aorta | (b) Blocking of coronary arteries. |
| (iii) Heart attack | (c) Sphygmomanometer |
| (iv) Blood pressure | (d) Largest vein |
| (e) Carry oxygenated blood to heart muscles. |
| Column I | Column II |
| (i) Australopithecus | (a) 735 cc |
| (ii) Homo habilis | (b) 900 cc |
| (iii) Homo erectus | (c) 850-1300 cc |
| (iv) Peking man | (d) 600 cc |
| (e) Vestigial organ |
| Column I | Column II |
| A. Lenticels | (i) An indicator of moisture |
| B. Cobalt chloride | (ii) Sunken stomata plant |
| C. Nerium | (iii) Minute openings on the woody stems |
| D. Guard cells | (iv) Kidney shaped cells that surround the stoma |
