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The lines cross on the Willamette Stone in the west hills of Portland, Oregon. In Oregon and Washington the rectangular survey system of township and range is referenced to the north-south Willamette Meridian and the east-west Willamette Base Line. Sections in each township are numbered consecutively beginning with number 1 in the northeast corner of the township, and counting right to left then left to right and so on weaving back and forth through the sections of the township, and ending with number 36 in the southeast corner. Each township is broken down into 36 sections each section is usually 640 acres. Townships are for the most part 36 square miles or 6 miles square. Land is broken down into areas called townships. Answer E: The diffusion of plants and animals was dependent on nomadic traders who traveled between agricultural villages because early farmers were sedentary and did not travel to other areas.Field Survey Plat View Instructions (PDF)Ī legal description/land description is the method of locating or describing land in relation to the public land survey system, which was established by law in 1785, under the Articles of Confederation. Answer D: The diffusion of plants and animals was limited to areas close to each hearth of domestication because the newly developed plants and animals could not readily adapt to different soil types. Answer C: Both domesticated plants and animals spread across the globe through contagious diffusion in early years by farmers and traders, and later by relocation diffusion through European exploration and colonialism. Answer B: Domesticated plants spread through wind-borne dispersal of seeds from their original hearth, expanding slowly until a vast region was covered with new plants. Which of the following best explains the diffusion of plants and animals from their hearths of domestication? Answer A: Animals were domesticated before plants and diffused rapidly from their hearth of domestication through contagious diffusion because they were mobile and moved easily from place to place.