17. Which statement correctily describes the interaction of fwo body systems? A. The reproductive system transports wastes from cells to the urinary system for excretion B. The nervous system produces hormones that control the function of the reproductive system C. The digestive system transports nutrients to the respiratory system. which excretes wastes D. The respiratory system obtains Oxygen that is delivered to cells by the circulatory system

A country with a fertility rate of 1.5 births per woman is likely to experience: a. Population decline. b. Population stabilization. c. Increased birth rates in rural areas. d. Rapid population growth.

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

1 สายใยอาหารนี้ประกอบไปด้วยกี่โซ่อาหาร .... 2 ผ้ผลิต ในสายใยอาหารนี้ มีกี่ชนิด

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

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