Atom, molecule, cell, tissue, organ, and organ system
Answer:
a Fallopian tube
Explanation:
fallopian tubes, are the female structures that transport the ova from the ovary to the uterus each month. In the presence of sperm and fertilization, the uterine tubes transport the fertilized egg to the uterus for implantation.
You can tell if matter is conserved if the substance changes . If the substance changes then matter has been conserved .
