The threats of California soil resources are soils, urban development
<u>Explanation:</u>
Native soils, unmodified by human activity, are becoming rare and we are losing the valuable power they provide. Soils in the Delta continue to subside.
Urbandevelopment has expanded into vast acres of prime farmland in California, diminishing our capacity to produce sustainable food and fiber.Increased fire frequency will increase soil erosion, resulting in depletion of nutrients from the soil and polluting the surface waters that receive the runoff.
Retrovirus have an enzyme known as reverse transcriptase which allows them to synthesize DNA from RNA going against the central dogma of life which is the synthesis of RNA from DNA. This phenomenon is called teminism.