The lower the fossil the older it is.
So, if two fossils were in different layers of sedimentary rock, the lowest fossil is older.
<span>Most X-linked conditions are recessive. This means that in a person with two X chromosomes (most females), both copies of a gene (i.e., one on each X chromosome) must have a change or mutation whereas in a person with one X chromosome (most males), only one copy of a gene must have a mutation. A female with a mutation in one copy of a gene on the X chromosome is said to be a “carrier” for an X-linked condition</span>
Explanation:
Answer 1) fertilization takes place in the fallopian tubes, which connect the ovaries to the uterus
Answer 2) sorry i dont know
Answer 3)The unborn baby is connected to the placenta by the umbilical cord. All the necessary nutrition, oxygen, and life support from the mother's blood goes through the placenta and to the baby through blood vessels in the umbilical cord
The organelles that perform roles equivalent to circulatory are ribosomes,endoplasmic reticulum,and the golgi body
