The content for this subtopic is found in two external pages. Please click the links below to access this information. Extreme Cold Hardiness in Ectotherms Costanzo, J. P. (2011) Extreme Cold Hardines...The content for this subtopic is found in two external pages. Please click the links below to access this information. Extreme Cold Hardiness in Ectotherms Costanzo, J. P. (2011) Extreme Cold Hardiness in Ectotherms. Nature Education Knowledge 3(10):3 Plant-Soil Interactions: Nutrient Uptake Morgan, J. B. & Connolly, E. L. (2013) Plant-Soil Interactions: Nutrient Uptake. Nature Education Knowledge 4(8):2