for the layer of the atmosphere in which air moves in a horizontal direction. While horizontal air movement occurs in all atmospheric layers, the stratosphere is particularly characterized by stable

Step 1: Solve Question 28. The question asks for the layer of the atmosphere in which air moves in a horizontal direction. While horizontal air movement occurs in all atmospheric layers, the stratosphere is particularly characterized by stable, horizontally layered air and strong horizontal winds (like jet streams), with limited vertical mixing due to its temperature inversion. In contrast, the troposphere experiences significant vertical mixing (convection) along with horizontal winds. The correct answer is C. Step 2: Solve Question 29. Thrombocytes, also known as platelets, are cell fragments essential for blood clotting. They are produced from megakaryocytes, which are found in the bone marrow. The correct answer is B. Step 3: Solve Question 30. The question asks which practice is not used for identifying farm animals. • Branding, ear-tagging, and tattooing are all common methods used to permanently or semi-permanently mark animals for identification purposes. • Culling is the process of removing animals from a herd based on certain criteria (e.g., age, health, productivity) to improve the overall quality of the herd. It is a management practice, not an identification method. The correct answer is A. Step 4: Solve Question 31. The hydrocarbon C_2H_4 has two carbon atoms and four hydrogen atoms. Its general formula is C_nH_2n, where n=2. This general formula corresponds to an alkene. For example, C_2H_4 is ethene, which has a carbon-carbon double bond. The correct answer is A. Step 5: Solve Question 32. The question asks for a correct statement about small-scale industry. • A. Small-scale industries are typically labor-intensive, not capital-intensive. • B. They often use appropriate or simpler technology, not necessarily advanced technology. • C. While many are in rural areas, they are not always exclusively located there. • D. Small-scale industries often focus on utilizing local resources and operating with relatively minimum input of materials compared to large-scale industries, emphasizing efficiency and local sourcing. The correct answer is D. Step 6: Solve Question 33. The question asks which structure is not part of the embryo sac in a flowering plant. The embryo sac (female gametophyte) typically contains: • An egg nucleus (within the egg cell). • Two polar nuclei (within the central cell). • Two synergids. • Three antipodal cells. The pollen tube is a structure that grows from the pollen grain to deliver sperm to the embryo sac, but it is not a component of the embryo sac itself. The correct answer is C. Step 7: Solve Question 34. The question asks which feedstuffs are main sources of energy for poultry. • I. Barley is a cereal grain rich in carbohydrates, making it a good energy source. • II. Copra cake is a byproduct of coconut oil extraction, high in fat and protein, providing significant energy. • III. Wheat bran is the outer layer of the wheat kernel, high in fiber but relatively lower in digestible energy compared to grains or oil cakes. It's primarily used for its fiber content. Therefore, barley and copra cake are main energy sources. The correct answer is A. Step 8: Solve Question 35. "Damping-off" (often spelled with a 'g') is a common disease that affects seedlings. It is caused by various soil-borne fungi and oomycetes, leading to the decay of the stem at the soil line, causing the seedlings to collapse and die. The correct answer is C. The final answers are: 28. C. Stratosphere 29. B. bone marrow 30. A. Culling 31. A. alkene 32. D. operates with minimum input of materials. 33. C. Pollen tube 34. A. I and II only 35. C. seedlings. Send me the next one 📸