How did ancient fish make the evolutionary jump from gills to lungs?

The first lungs evolved from swim bladders in fish that gulped air and so were already using the gas bladder as a primitive lung.

(I do NOT own this answer ._. )

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.

we need additional information in order to determine the cause of death for anna garcia. there are at least 3 things with explanation included as to why we need them are as follows: