Question 24
Reproduction in AnimalsWhich of the following substances from the mother's blood diffuse through the placenta into the blood vessels of the foetus?
- A.Carbon dioxide and oxygen
- B.Glycogen and starch
- C.Urea and carbon dioxide
- D.Glucose and oxygen
- E.Digested food and carbon dioxide
Show the answer and explanation
Answer: D (Glucose and oxygen)
Explanation
The foetus receives oxygen and food such as glucose from the mother; carbon dioxide and urea go the other way.