Studying embryology help scientists understand
1) how species reproduce
2) how a species makes food through photosynthesis
3) The early stages of an organisms growth
4) where organisms migrate during their lives

3) The early stages of an organisms growth

Explanation:

Embryology is the study of an organisms prenatal phase. This is the early development stage where the organism is still undergoing some changes before birth in order to become a full grown young one.

It involves the study of different stages that occurs from the point of fertilization to the embryo and foetus formation.

This explanation validates option 3.

both male and female gametes are produced by meiosis of the germ cells. therefore, both male and female gametes are haploid. one male and one female gamete unite during the fertilization to form the diploid zygote. in seed bearing plants, pollen grain is the male gametophyte, which produces sperm cells.