Examine the diagram below and answer the following for 1 point each: 1. Identify the two structural differences shown in the evolution of the whale.

2. Explain how one of the structural differences allowed them to become better adapted to the oceans.

the element that provides strength to the exoskeletons of clams and oysters is phosphorus. this is so because calcium carbonate is the main component in the shells.

explanation:

affects the water bodies: excessive use of fertilizers causes eutrophication. the fertilizers which are used on plants affect the quality of land on which it is used, further causing erosion of soil. the fertilizers used on plants contain harmful chemical fumes which affect the environment.