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

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

1 สายใยอาหารนี้ประกอบไปด้วยกี่โซ่อาหาร .... 2 ผ้ผลิต ในสายใยอาหารนี้ มีกี่ชนิด

80. Deficiency Which the following nutrients causes retarded * 1 point growth in plants? A)lron B)Magnesium c)Copper D)Calcium 81. Which of the following are examples of macro minerals? * 1 point (a) Sodium (b) Calcium (c) Chloride (d) All of the above

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

By stimulating secretion of peptidases from the pancreas into the duodenum, cck facilitates the digestion of:________