Zinc, iron, and copper are examples of macronutrients. Humans are nitrogen-based life forms. False - pg. The sedimentary cycle refers to calcium, iron, and phosphorus getting leached from sedentary rocks by water erosion. True - pg.
Primary succession is the first step of succession.
True - pg. A climax community is the final step of succession. True - pg. A spruce tree is an example of a pioneer plant. False - pg.