Question 6
Cell and Its EnvironmentWhich of the following processes occurs by diffusion?
- A.Reabsorption of water in kidney tubules
- B.Entry of water into the cytoplasm of unicellular animals
- C.Absorption of water in the large intestine
- D.Exchange of nutrients between a mother and the foetus
- E.Movement of water in and out of living cells
Show the answer and explanation
Answer: D (Exchange of nutrients between a mother and the foetus)
Explanation
Food and oxygen pass from mother's blood to the foetus across the placenta by diffusion; the other options are movements of water (osmosis).