Which statement is correct?
a. Fertilization usually takes place in the fallopian tube and implantation takes place in the uterus.
b. Fertilization usually takes place in the ovary and implantation takes place in the fallopian tube.
c. Fertilization and implantation usually takes place in the uterus
d. Fertilization and implantation usually take place in the fallopian tube.
Answer: a. Fertilization usually takes place in the fallopian tube and implantation takes place in the uterus.