You are studying black spruce (Picea mariana), which is the most dominant tree species in North American boreal forests, a. Consider climate change predictions for North America. For long-lived species such as black spruce, is phenotypic plasticity or adaptation through natural selection more likely to help this species survive in the future. Briefly explain your answer. 2 pts. You have 3 black spruce field sites that span a range of latitudes in Canada: northern (65°N), mid (60°N), and southern (55°N). There is a latitudinal gradient in growth; trees in the northern most population grow less each year than tress in the south. You can collect seedlings from these field sites and grow them in your greenhouse. Design an experiment to determine if the observed differences in growth are because of adaptation or phenotypic plasticity - be sure to indicate your independent and dependent variables and briefly explain your methods. 2 pts. b. You are studying black spruce (Picea mariana), which is the most dominant tree species in North American boreal forests, a. Consider climate change predictions for North America. For long-lived species such as black spruce, is phenotypic plasticity or adaptation through natural selection more likely to help this species survive in the future. Briefly explain your answer. 2 pts. You have 3 black spruce field sites that span a range of latitudes in Canada: northern (65°N), mid (60°N), and southern (55°N). There is a latitudinal gradient in growth; trees in the northern most population grow less each year than tress in the south. You can collect seedlings from these field sites and grow them in your greenhouse. Design an experiment to determine if the observed differences in growth are because of adaptation or phenotypic plasticity - be sure to indicate your independent and dependent variables and briefly explain your methods. 2 pts. b.