What determines whether or not a particular phenotype is beneficial to an organism?

answer: national resource conservation services

national resource conservation services is the us. based approach that provides technical and financial assistance for natural resource management. nrcs society in conservation of resources by involving in activities like farmland protection, flood prevention, watershed protection, urban conservation, conserves economic and environmental conditions. it conducts soil surveys and implements the policy of natural resources management on the society.

where in your body is there an enzyme that does function at a high or low ph? what is the name of that enzyme and its function?