This biology question covers important biological concepts and processes. The step-by-step explanation below helps you understand the underlying mechanisms and reasoning.
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Welcome back — been a while! Let's pick up where you left off. Here are the answers to the questions: 19. Poor waste management can worsen water scarcity because it: B. Pollutes available water sources Explanation:* Poor waste management contaminates rivers, lakes, and groundwater, making these water sources unsafe and unusable, thereby reducing the supply of clean water. 20. In the North West Region, farmers construct terraces on steep slopes. The main reason for this practice is to: B. Reduce surface runoff and soil erosion Explanation:* Terracing creates level steps on slopes, which slows down the flow of water, allowing it to infiltrate the soil and preventing soil from being washed away. 21. If snakes disappear from a food chain (Grass → Rat → Snake → Hawk), what is the most likely effect? B. Increase in rats Explanation:* Snakes are predators of rats. If snakes disappear, the rat population will no longer be controlled by this predator, leading to an increase in their numbers. 22. Acacia trees in the Sahel region have small leaves and deep roots to: B. Reduce water loss and reach underground water Explanation:* Small leaves minimize the surface area for transpiration, reducing water loss, while deep roots allow the trees to access scarce groundwater in arid environments. 23. Limestone rocks formed from compacted shells and weathered rock particles. It is therefore a: C. Sedimentary rock Explanation:* Sedimentary rocks are formed from the accumulation and compaction of sediments, which can include organic remains like shells and mineral particles. 24. Strong onshore winds along the coast mainly contribute to: A. Formation of sand dunes inland Explanation:* Strong onshore winds pick up sand from beaches and transport it inland, depositing it to form sand dunes. 25. River Benue and its tributaries form a tree-like pattern. This drainage pattern is known as: C. Dendritic Explanation:* A dendritic drainage pattern is characterized by a tree-like branching system where tributaries join larger rivers at acute angles, resembling the branches of a tree. 26. One effective way to reduce loss of lives during a volcanic eruption is to: C. Establish evacuation plans Explanation:* Having clear and well-practiced evacuation plans allows people to move to safety quickly before or during an eruption, significantly reducing casualties. 27. Heavy rainfall in Dschang increases the risk of landslides because it: B. Reduces slope stability Explanation:* Heavy rainfall saturates the soil on slopes, increasing its weight and reducing the friction between soil particles, which makes the slope less stable and more prone to landslides. 28. A country improves access to clean water, education and healthcare but still depends mainly on exporting raw cocoa. This situation shows: B. Social development with economic underdevelopment Explanation:* Improvements in water, education, and healthcare indicate social progress, but reliance on exporting raw materials without significant industrialization or diversification points to a lack of economic development. 29. Rice farming in Asia is intensive because it: B. Uses much labour on small land Explanation:* Intensive farming involves applying a high amount of labor or capital to a small area of land to maximize output, which is typical for rice cultivation in many parts of Asia. 30. Overuse of fertilizers on farms near rivers may lead to: B. Water pollution Explanation:* Excess fertilizers can be washed into rivers by rain, leading to nutrient runoff that causes eutrophication and other forms of water pollution. 31. According to Von Thünen, dairy farming is located near cities mainly because: C. Transport costs for perishable goods must be low Explanation:* Dairy products like milk are highly perishable. Locating dairy farms close to urban markets minimizes transport time and costs, ensuring the fresh product reaches consumers efficiently. 32. A major problem of the Green Revolution is: B. Soil and water pollution Explanation:* The Green Revolution's reliance on chemical fertilizers and pesticides led to widespread soil degradation and water pollution from agricultural runoff. 33. Climate-smart agriculture aims to: C. Improve productivity while reducing climate risks Explanation:* Climate-smart agriculture seeks to sustainably increase agricultural productivity and incomes, adapt and build resilience to climate change, and reduce greenhouse gas emissions. 34. Large tropical forests are mainly found around the: B. Equatorial region Explanation:* Tropical forests thrive in the warm, humid conditions with high rainfall found predominantly in the equatorial zone. 35. Mining of iron ore supports industrial growth because it provides: B. Raw materials for industries Explanation:* Iron ore is the primary raw material used to produce steel, which is a fundamental component for various industries like construction, manufacturing, and automotive. Send me the next one 📸