After a volcanic eruption, ecosystems undergo a series of events known as succession. a study done by ecologists on mount st. helens concludes that primary succession occurs when lupines are able to enrich the soil. lupines are a nitrogen-fixing plant well adapted to colonizing sterilized ecosystems. however, the progression of the lupine is slowed by a certain predatory caterpillar. what would be the most successful strategy for ensuring succession in an area where lupines and the caterpillars both colonize? a) introduce a controlled fire to begin secondary succession b) move the caterpillar populations to a different area c) spread lupine seeds to increase the density of growth d) replace the lupines with another type of plant

4.) metal

"-the movement of carbon from the nonliving environment into living things and back to the environment

-carbon is the essential component of proteins, fats, and carbohydrates (which make up all organisms)

-carbon exists in air, water, and living organisms

-producers convert carbon dioxide in the atmosphere into carbohydrates during photosynthesis

-bacteria in the atmosphere cycles through the system in filtration units

-in cellular respiration, carbon is released back into the atmosphere as carbon dioxide

-some carbon is stored in limestone (forming one of the largest "carbon sinks" on earth)

-largest carbon reservoir on earth= limestone

-carbon stored in the bodies of organisms as fat, oils, or other molecules may be released into the soil or air when the organism dies

-this may form deposits of coal, oil, or natural gas (fossil fuels, which increased the atmospheric carbon dioxide)

-fossil fuels store carbon left over from bodies of organisms that died millions of years ago

-they are located in the surface of earth, deep within the earth and beneath the ocean floor."    

not sure if this is what you'r looking for nnew= nold