Which of the following could be added to a tank of fish to integrate two biological systems?

A. Rocks for the fish to swim through

B. Fish food made from grains

C. Algae

D. Wild fish food

Some technological solutions to problems like global warming meet the specific needs and situations of local communities. an example from india involves converting the solid waste from cattle into clean-burning fuel for cooking. this reduces the amount of greenhouse gases, specifically methane and carbon dioxide, released into the environment from wood fires. when evaluating the feasibility of implementing this solution, computer models are used to weigh costs against benefits. what factor is least likely to impact the decision on adopting this technology?

What is the ecological role of food chains and food webs

Add solid urea to a beaker of water. the beaker gets very cold. is δh favorable or