SCSC 105 Exam 1 Questions with 100% Correct Answers | Verified | Updated 2024, Exams of Advanced Education

Download SCSC 105 Exam 1 Questions with 100% Correct Answers | Verified | Updated 2024 and more Exams Advanced Education in PDF only on Docsity! SCSC 105 Exam 1 Questions with 100% Correct Answers | Verified | Updated 2024 Compare/Contrast the 1600-1700s, 1800s, and 1900s-2000 in terms of -Farm size -% of labor force in agriculture -Production methods practices that defined the era - Correct Answer-1600s-1700s: -small -90% -manual labor 1800s: -small to medium -58% -horse, mule, slave (pre civil war) and harvestors, reaping and threshing, steam powered engines (post civil war) 1900s-2000: -large -38% pg. 1 professoraxe l -mechanical power, synthetic chemicals (herbicides, pesticides, fertilizers) Depict the change in number and size of farms in the US from 1900-2007 in graphic form. - Correct Answer-Decrease in number of farms while average farm size increases What agency represents agricultural interests in the Federal government? -List 3/5 classes of funding included in the USDA budget. - Correct Answer-United States Department of Agriculture (USDA) -farm/commodity support -agricultural research -international trade Compare the dictionary definition of a farm to the USDA definition. - Correct Answer-Dictionary: -any plot of land devoted to agriculture and to the raising of crops and domesticated animals USDA: pg. 2 professoraxe l Perennials: -Plants that persist for 3 or more growing seasons List the top 5 crops in the World, the US, and Texas - Correct Answer-Worldwide: -corn, wheat, rice, potatoes, cassava United States: -corn, cotton, fruit/tree nuts, rice, soybeans Texas: -cotton, hay (forage), corn, sorghum, wheat List characteristics of the following crop categories (Give family name and an example) Cereal crops Legumes Fiber crops Sugar crops Root and tuber crops - Correct Answer-==Cereal crops: -Poaceae family (rice) ==Legumes: pg. 5 professoraxe l -Fabaceae family (peanuts) ==Fiber Crops: -Malvaceae family (cotton) ==Sugar Crops: Sugarcane (Poaceae family): ==Root and tuber crops: -Potato -Solanaceae family norman borlaug - Correct Answer-you can't build a peaceful world on empty stomachs and human misery What is the difference between the anatomy and morphology of a plant? - Correct Answer-Anatomy: -study of the internal tissues of the plant -epidermis, vascular system, meristems, ground tissue Morphology -the form and structure of the plant -seeds, leaves, stems, roots, flowers pg. 6 professoraxe l List and briefly describe the 4 types of anatomical plant tissues. - Correct Answer-Dermal tissues: -epidermis & stomata & cuticles Vascular Bundles: -made up of conducting tissues in stems, leaves, and roots Ground Tissue: -tissue other than epidermis or vascular bundles Meristems: areas of actively dividing cells List the 5 general morphological structures in plants, and briefly describe the function of each structure. - Correct Answer-Seeds: -a flowering plant's unit of reproduction (embryonic plant) Roots: -anchor the shoot in the soil and support upright growth of stems -absorb minerals and water from the soil -provide storage of energy reserves Stems: pg. 7 professoraxe l Define selection - Correct Answer-Process by which breeders recognize and select individual plants with superior characteristics from a larger, variable population. Name 2 self-pollinating crops, 2 cross-pollinating crops, and 2 crops that use both methods of pollination. - Correct Answer- Self Pollinating: -wheat -soybean Cross Pollinating: -corn -potato Both: -cotton -sorghum Compare and contrast qualitative traits and quantitative traits in terms of: How many genes control expression How expression occurs Give an example pg. 10 professoraxe l ++ - Correct Answer-Qualitative: -Controlled by one or a few genes -Distinct classes -Low environmental influence -Example: Flower color Quantitative: -Controlled by many genes -Continuous spectrum of expression -High environmental influence -Examples: plant height, yield Briefly describe the two steps involved in hybridization. - Correct Answer-Develop inbred lines: -Self-pollinating selected corn plants -Inbreeding creates a homozygous genetic situation -You KNOW what genes the parent will give the offspring Cross two inbred lines -First hybrid typically has superior traits to either inbred parent -Superior ability is called hybrid vigor or heterosis pg. 11 professoraxe l What is the current world population? What is the projected future for world population (2050)? - Correct Answer-7.7 billion, 9.7 billion Who is Norman Borlaug? Name 3 of his major accomplishments. - Correct Answer--Father of the Green revolution -Developed semi-dwarf wheat varieties in Mexico -Saved a BILLION people -Awarded the 1970 Nobel Peace Prize What are the 4 reasons crop yields continue to increase each year? - Correct Answer-Plant breeding, Optimizing field fertility (fertilizer), Improved irrigation, Improved management practices What factor causes 11% of the world's population to be undernourished? - Correct Answer-food is not evenly distributed Describe the 2 environmental limitations to food production. - Correct Answer-Soil resources: -Arable land pg. 12 professoraxe l