WAEC GCE BIOLOGY OBJ AND ESSAY

*WELCOME TO ENGR NASER DAHER SOLUTIONS CENTER* *OUR WORK IS TO DELIVER COMFIRMED WAEC NECO JAMB NABTEB BECE ANSWERS* 09030302775 🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥 1a) Skeleton of mammal: this consists of a head at one end of a vertebral column from which extend ribs to support the working organs and four limbs for locomotion. The vertebral column ends in a tail. 1b) i)Exoskeleton eg.. ii)endoskeleton eg. Mammals iii)Hydrostatic skeleton eg. Soft body animals 1c) i)Support:- The rigid framework of the skeleton gives support to the body ii)Protection:- The skeleton protects important and delicate organs of the body iii)Respiration:- The skeleton also aids in respiration ========================= (2a) Vitamins are group of organic compounds which are essential for normal growth and nutrition and are required in small quantities in the diet because they cannot be synthesized by the body. (2b) Vitamin: C One Function: Healing of wounds One Deficiency: Scurvy One Source: Citrus Fruits Vitamin: D One Function: Strong bones and teeth One Deficiency: Rickets One Source: Eggs Vitamin: B One Function: Releases energy from cabohydraes One Deficiency: Beri-beri One Source: Yeast Vitamin: K One Function: Clotting of blood One Deficiency: Failure of blood to clot One Source: Milk (2c) (i) Iron: Assists in nitrate and sulfate reduction and energy production within the plant (ii) Nitrogen: For rapid growth (iii) Calcium: It is responsible for holding together the cell walls of plants ================================= (3ai) Mango trees -> Caterpillars -> chicks of domestic fowls -> Hawks (3aii) Draw the diagram (3bi) Water: -Serves as a habitat for organisms. -Serves as a source of water for irrigation. -Serves as a source of hydroelectric power. (ii) Soil: -It ensures continuous sources of plant nutrients. -It ensures sources of water/reservoir for soil organisms. -It ensures sources of raw materials for some industries. (iii) Forest: -It ensures the conservation of trees or forest product. -It helps to check erosion. -It helps in the preservation of natural spaces. [04/09 11:02 am] ENGR NASER DAHER: 6a) i)flexible dujardin ii)robert hooke iii)mathiahs von virckow 6b) TABULATE classes of plant bases of life cycle and example i)annual - maize, rice ii)biennial - carrot, ginger iii)perenial - banana, cocoa 6c) The amniotic fluid help on neutralize the effect of changes external temperature 6d) i)Rhizobium- fixes atmospheric nitrogen directly into the plant ii)Azotobacter- fixes atmospheric nitrogen into the soil either aerobically anaerobically iii)Blue Green- improve soil fertilizer 6e) Click HERE for The Diagram