Final answer:
The term that means 'before birth' is 'prenatal,' and the correct sequence of prenatal development is zygote, embryo, and then fetus. Post-birth, the neonate undergoes significant adaptations during the neonatal period.
Step-by-step explanation:
The word that means 'before birth' is d. prenatal. This term is used to describe the period of development that occurs before a baby is born, encompassing the germinal, embryonic, and fetal stages of growth.
As for the correct order of prenatal development, the sequence is d. zygote, embryo, fetus. A zygote is the initial cell formed when a new organism is conceived. It then develops into an embryo, which later progresses into the stage known as a fetus.
After birth, during the neonatal period, the newborn, also referred to as a neonate, experiences many physical and physiological adjustments to adapt to life outside the uterus.