Almost the entire system of an embryo is made of cartilage, whereas that of an adult is mostly made of bones.
Explanation:
Cell membranes are selectively permeable. Some solutes cross the membrane freely, some cross with assistance, and others do not cross at all. A few lipophilic substances move freely across the cell membrane by passive diffusion. ... Large molecules do not cross intact cell membranes, except in certain special cases.
Answer:
Thus, the correct answer is 'Carbon dioxide, water, and sunlight'.
