Selina Concise Biology Class 9 ICSE Solutions Waste Generation and Management

Exercise 1 Solution A. (a) Old newspapers (a) plastics Solution B.1. (a) Sludge(b) Scrubber, Plate type electrostatic precipitator Solution B.2. (a) True(b) True(c) False. Electricity is one of the secondary needs of human society. Solution B.3. Column I Column II 1. Cow dung (iii) Manure(i) Sugarcane 2. Bagasse (i) Sugarcane 3. Old newspapers (ii) Raddiwalas(i) […]

Selina Concise Biology Class 9 ICSE Solutions Chapter 17: Aids To Health

Exercise 1 Solution A. (c) An antibiotic (c) Tetanus (a) April 7 Solution B.1. (a) Arsphenamine or Salvarsan (b) Penicillin (c) Passive acquired immunity (d) Antiseptics – Lysol, iodine, boric acid and carbolic acid Disinfectants – Cresol and phenol Antibiotics – Ampicillin and penicillin (e) Oral polio vaccine (OPV) Solution B.2. (i) Acquired Immuno Deficiency […]

Selina Concise Biology Class 9 ICSE Solutions Chapter 15 Hygiene – A Key To Healthy Life

Exercise 1 Solution A. (d) cholera (d) Sharing towels with others (d) Plasmodium (c) Fluorides (b) Bacteria Solution B.1. Column I Column II (Answers) (a) Mosquito (iv) Malaria (b) Plasmodium (iii) Vector (c) Entamoeba histolytica (v) Dysentery (d) Aedes mosquito (ii) Dengue (e) Insecticide (i) DDT Solution B.2. (a) Vectors (disease carriers) (b) Pathogens (c) […]

Selina Concise Biology Class 9 ICSE Solutions : Chapter 14

Exercise 1 Solution A.1. (b) contracts (a) alveoli (b) loss in dry weight Solution B.1. (a) Diaphragm(b) Ethyl alcohol(c) Diffusion(d) Diffusion(e) Hypoxia(j) Vocal cord Solution B.2. (a) Epiglottis(b) Capillaries(c) Diaphragm(d) Bronchioles(e) Ribs(f) Alveoli or air sacs Solution B.3. COMPONENT INSPIRED AIR EXPIRED AIR 1. Oxygen 20.96% 16.40% 2. Carbon dioxide 0.04% 4.00% 3. Nitrogen 79.00% […]

Selina Concise Biology Class 9 ICSE Solutions Chapter 12: Movement And Locomotion

Exercise 1 Solution A. (b) Cartilage (d) Hip (a) Cervical-7 (b) Ear ossicles Solution B.1. Parts of the skeleton Location Transverse process Neural arches in vertebra Glenoid cavity Pectoral girdle Shoulder-blade Shoulder girdle Acetabulum Pelvic girdle Solution B.2. External Ear Tip of the nose Solution C.1. True rib Floating rib 1. The first seven pairs […]