How Mineral fertility can be restored ?

Gene theraphy is an attempt to correctr a genetic defect by providing a normal gene into the individual. By this, the normal function can be restored. An alternate method would be to provide the gene product known as enzyme replacement therapy. It would also restore the function. which in your opinion is a better option? Give reason for your answer.

Define soil fertility. How can it be maintained ?

How do fertilizers enrich the fertility of the soil ?

Double fertilization is

Mineral used in body is

How can microorganisms be used to decrease the use of chemical fertilizers and pests ?

Give an example each of animal ashowing external fertilization and another of internal fertilization.

Define Fertilizer.