Question

1. review describe the law of conservation of matter. 2. infer why is it said that photosynthesis and cellular respiration are reverse chemical processes? 3. sequence describe the roles of organisms in the phosphorus cycle. 4. classify a classmate describes a bacterium to you as living on the roots of clover and providing nutrients to the plant. would you classify this bacterium as nitrogen - fixing, nitrifying, or denitrifying? explain.

Explanation:

1. The law of conservation of matter states that matter cannot be created or destroyed in a chemical reaction. It can only change forms.
2. Photosynthesis uses carbon - dioxide and water to produce glucose and oxygen; cellular respiration uses glucose and oxygen to produce carbon - dioxide and water, thus they are reverse processes.
3. In the phosphorus cycle, producers absorb phosphate from the soil or water and incorporate it into organic compounds. Consumers obtain phosphorus by eating producers or other consumers. Decomposers release phosphorus back into the environment when they break down dead organisms.
4. Nitrogen - fixing bacteria live in symbiotic relationships with plants like clover and convert atmospheric nitrogen into a form usable by plants. Since the bacterium on clover roots provides nutrients to the plant, it is a nitrogen - fixing bacterium.

Answer:

1. Matter cannot be created or destroyed in a chemical reaction, only change forms.
2. Photosynthesis produces glucose and oxygen from carbon - dioxide and water, while cellular respiration uses glucose and oxygen to produce carbon - dioxide and water.
3. Producers absorb phosphate, consumers obtain phosphorus by eating, and decomposers release phosphorus from dead organisms.
4. Nitrogen - fixing bacterium. It lives in symbiosis with clover and provides nutrients to the plant by converting atmospheric nitrogen into a usable form.