SCSC 105 Carson TAMU Exam 2 Questions With Complete Solutions

Define ecosystem correct answer: The collective function of organisms and their environment Where were the 2 crops discussed in the video grown? correct answer: The papaya was grown in Hawaii, and the banana was grown in Uganda What are the 5 components of an ecosystem? correct answer: 1. Food chains 2. Diversity 3. Competitive exclusion 4. Plant succession 5. Nutrient cycles Define agroecosystem correct answer: Ecosystems modified to produce, food, fiber, and/or shelter Identify the 5 soil forming factors correct answer: 1. Climate 2. Organisms (biota) 3. Relief (topography) 4. Parent material 5. Time What are the 3 functions served by soils? correct answer: 1. Anchorage for plants 2. Storage for water or nutrients for plant uptake 3. Habitat for soil organisms What are 2 risks of simplified agroecosystems? correct answer: 1. Diversity becomes limited 2. Problems can become magnified What pests threatened the 2 crops in the documentary? correct answer: Papaya were threatened by the ringspot virus (Hawaii) Banana were threatened by banana wilt, bacteria (Uganda) What % of total cropland in the U.S. and Texas is organic certified? correct answer: U.S. = 1.5% TX = 0.5% What are the top 3 myths about organic production? correct answer: 1. Organic production doesn't use pesticides (they do, ex. rotenone)