fetus

"The doctor used ultrasound to see the baby inside the mother's womb. "

"an unhatched egg"

"The students are developing their reading skills in their English class. "

"The sequence of events in the school play was: introduction, conflict, climax, and resolution. "

"To explain a chapter of the Bible."

"A dog is a vertebrate because it has a backbone. "

"Starting tomorrow, I will wake up an hour earlier to exercise. "

"All he had to show for four years of attendance at college was a framed piece of paper."

"The elephant's gestation period, lasting almost two years, is the longest of any mammal. "

"The scientist studied the reproductive cycle of the fruit flies in her lab. "

"Hydrogen chloride is a diatomic molecule, consisting of a hydrogen atom and a chlorine atom."

"In IVF treatments, doctors carefully monitor the development of fertilized eggs to select the healthiest blastocysts for implantation. "