Reproductive multiple choice #1?

Question

Which process normally occurs at the placenta?
1-Oxygen diffuses from fetal blood to maternal blood
2-Materials are exchanged between fetal and maternal blood
3-maternal blood is converted from maternal blood to fetal blood
4-digestive enzymes pass from maternal blood to fetal blood

In humans, a sperm cell and an egg cell normally fuse in the upper portion of the
1-cervix
2-vagina
3-oviduct
4-ovary

Estrogen has a direct effect on the
1-fromation of a zygote
2-changes within the uterus
3-movement of an egg toward the sperm
4- Development of a placenta within the ovary

Which statement about sperm cell is true?
1-they are produced by females
2-they are fertilized in an ovary
3-they transport genetic material
4-they are produced by mitosis

Answer 1

1
3
2
3