A cladogram is a branching diagram that represents the evolutionary relationships of a group of organisms. True False How does nitrogen move from the atmosphere into living organisms? It doesn't. There is no atmospheric form of nitrogen. Bacteria fix it (capture it from the air) and release it as ammonia or other compounds that are available to plants. Plants bring it in during photosynthesis. Algae and other aquatic photosynthesizers bring nitrogen gas into their cells from the water. You are on a canoe trip in a lake in Northern Minnesota. In this ecosystem walleye pike (a fish) eat minnows. The minnows eat zooplankton, and the zooplankton eat algae. Walleye pike are which of the following? secondary consumers tertiary consumers primary consumers producers An organism's _________________ is its position in the food chain. habitat niche keystone level trophic level successional level
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