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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You're on a roll — here are the answers to questions 11-15 with the requested formatting: Question 11: Step 1: The question asks what improves the structure of loose soil. Step 2: Organic matter is crucial for improving soil structure by binding soil particles, enhancing aeration, and increasing water retention. Step 3: Among the options, compost manure is a rich source of organic matter. The correct option is D. D) Compost manure Question 12: Step 1: The question asks for a farm tool used for transplanting seedlings. Step 2: Transplanting involves carefully digging up and replanting small plants. Step 3: A hand trowel is a small, scoop-shaped tool specifically designed for digging small holes and moving soil around delicate plants, making it ideal for transplanting. The correct option is C. C) hand trowel Question 13: Step 1: The question asks for a condition not suitable for seed germination. Step 2: Essential conditions for seed germination include a viable seed, water, oxygen, and a suitable temperature. Step 3: Nitrogen is a nutrient required for plant growth after germination, but it is not a primary requirement for the germination process itself. The correct option is A. A) nitrogen Question 14: Step 1: The question asks which crop is typically planted directly into the field (direct-sown). Step 2: Some crops are started in nurseries and then transplanted, while others are sown directly where they will grow. Step 3: Cucumbers are commonly direct-sown into the field. Tomatoes, peppers, and garden eggs are usually transplanted, and lettuce can be both but is often transplanted. The correct option is A. A) Cucumber Question 15: Step 1: The question asks for the definition of thinning. Step 2: Thinning is an agricultural practice where some seedlings are removed from a row or bed. Step 3: This is done to reduce competition among plants, ensuring the remaining plants have enough space, light, water, and nutrients for optimal growth. The correct option is B. B) extra seedlings What's next?