Urbanization occurs when rural or natural areas undergo development and become urban areas. What are two specific ways in which urbanization can affect surface-water quality in the immediate area?
Increased erosion can cause chemical runoff and overflow of sewage into streams can add bacteria and viruses to the water.
Overflow of sewage into streams can add bacteria and viruses that are beneficial decomposers to the water and erosion will allow for new
plant growth
Increased erosion will allow fresh new soil to be used by plants
Increased erosion and overflow of sewage will contribute to the overall health of the ecosystem

d. organisms have cells with different shapes and functions.

it provides an alternative energy pathway for the reaction to proceed.

a catalyst is a substance that speeds up the rate of a chemical reaction but is not consumed during the course of the reaction.

catalysts increase the rate of reaction without being used up. they do this by lowering the activation energy needed. with a catalyst, more collisions result in a reaction, so the rate of reaction increases. different reactions need different catalysts.

a catalyst works by providing an alternative reaction pathway to the reaction product. the rate of the reaction is increased as this alternative route has a lower activation energy than the reaction route not mediated by the catalyst.