Final answer:
The correct order of prenatal development phases is zygotic, germinal, embryonic, and fetal. These stages cover the process from fertilization to birth and are essential for proper growth and development of a new individual.
Step-by-step explanation:
Correct Order of Prenatal Development Phases
The proper order of the phases of prenatal development is zygotic, germinal, embryonic, and fetal. This means that the correct answer to the question provided is D) zygote, embryo, fetus. Each phase plays a crucial role in the development of a new individual:
- Zygotic phase: Begins with fertilization and cell division, turning the egg and sperm into a zygote.
- Germinal stage: This stage follows the zygotic phase and includes cleavage, blastulation, and the implantation of the blastocyst in the uterus.
- Embryonic stage: Starting from implantation and lasting until the eighth week after fertilization, this phase involves substantial growth and differentiation of the developing embryo.
- Fetal stage: From the ninth week of gestation until birth, during which the body, brain, and organs undergo significant growth.
Each stage is crucial for proper development, and disruptions can lead to developmental issues.