82. Which of the following minerals controls growth and body * weight? (a) lodine (b) Calcium (c) Phosphorous (d) All of the above 83.Chemical digestion of carbohydrates begins in the * A. esophagus B. stomach C. duodenum D. oral cavity

Mining contributes significantly to the economies of West African countries. What is a major environmental issue associated with gold mining in Ghana? a. Mercury contamination in rivers and groundwater b. \( \begin{array}{l}\text { Depletion of coastal wetlands due to } \\ \text { excavation }\end{array} \) c. \( \begin{array}{l}\text { Overgrazing of land used for mining } \\ \text { settlements }\end{array} \) displacement of forest-dwelling communities

1 สายใยอาหารนี้ประกอบไปด้วยกี่โซ่อาหาร .... 2 ผ้ผลิต ในสายใยอาหารนี้ มีกี่ชนิด

rotation (c) biological control (d) regular weeding 21. The factors affecting the productivity of pasture are the following except one (A) Aggressiveness (b) Persiveness (c) Edaphics (d) Accurate stocking 22. A good pasture plant must have the following qualities except (a) it must have a high leaf to stem ratio (b) ability to regenerate (c) ability to withstand extremes of climatic conditions (d) it should have moderate vapour cement or succulent. 23. Which of the following is not correct about land use act? (a) land cannot be used for any purpose (b) government has control over unused land (c) it does not lead to land gramentation (d) it aim at it allocation of land for farming purpose 24. Forage crops in natural pasture can withstand trampling by \( \qquad \) (a) pest crops (b) farm stead (c) giant star grass (d) farm animals 25. The process of deliberately planting grasses and legumes, to feed livestock is (a) artificial pasture (b) natural pasture (c) temporary pasture (d) irrigated pasture

26. A place of land can be used as collateral to obtain loans from commercial banks, when the land \( \qquad \) (a) inherited from his parents (b) given for use over a short period of time (c) allocated by the government (d) requires the payment of certain amount of money for the land 27. Which of the following statement is not correct about afforestation (a) it prevent the leaching of plant nutrient (b) it increases soil moisture retention (c) undesirable species of timber are removed (d)regular supply of raw materials 28. Plants that are cultivated for their vegetative portions and used in fresh or preserved form for feeding livestock is (a) arable cropping (b) forage (c) pasture (d) monocropping 29. Diseases can be spread on a crop farming through any of the following except one (a) through planting of vegetables (b) through insect vectors (c) through irrigation water (d) through visitors to the farm 30. \( \qquad \) is the planting of arable crops at early stages of forest establishment and are harvested before the trees form canopies (a) Selective exploration (b) Taungya system (c) Regeneration

Untuk mengamati fertumbuhan bauteri Pada inangnya. Seorang Penelit: mengambil Potongan inangnya yang sudah terinfeksi bauteri tersebut dan mengamati selama 5 jam pertama. Poda inangnyatersebut terdafat 30 bauteri. Setelan diamati baikleri tersebut membelah menjadi dua setiap 30 menit. a. Modelkan fungsi Pertumpuhan bakteri setiap fase! Mang