In the alternation of generations life cycle a zygote is formed after fertilization takes place. this zygote grows into an adult plant called a

The correct answer will be - diploid sporophyte.

Explanation:

The life cycle of plants shows - Alternation of generation which divides the life into two phases- a haploid gametophyte and a diploid sporophyte.

In the given question, a diploid zygote is formed after the fertilization of haploid male and female gametes. The zygote develops inside the ovary to form an embryo which forms a diploid sporophyte.

The sporophyte is the plant part which can be easily distinguished it is divided into the distinct stem, root and leaves.

Thus, the diploid sporophyte is the correct answer.