Multiple Choice
Which statement is NOT true of the placenta and umbilical blood vessels?
A) Two umbilical arteries take blood to the fetus.
B) Maternal blood does not mix with fetal blood in the placenta.
C) The umbilical vein contains blood with a high level of oxygen.
D) In the placenta,exchanges take place by diffusion and active transport.
Correct Answer:
Verified
Correct Answer:
Verified
Q28: Which of the following statements are true
Q32: Which of the following statements are true
Q77: When the gene for a trait is
Q78: Which of these embryonic structures is NOT
Q107: A person has two genes for each
Q139: The early embryonic stage that is a
Q143: Normal implantation of the blastocyst takes place
Q155: In the early embryo, the mesoderm gives
Q160: A person who is homozygous for a
Q191: The placental hormones that prepare the mammary