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 สายใยอาหารนี้ประกอบไปด้วยกี่โช่อาหาร

1 สายใยอาหารนี้ประกอบไปด้วยกี่โซ่อาหาร .... 2 ผ้ผลิต ในสายใยอาหารนี้ มีกี่ชนิด

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

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

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