The answer would be Prevents reflux of air back into the chest
Pneumothorax happens if there is hole between the visceral pleura and parietal pleura which normally have negative pressure. This allow the air slip out into the space, prevent the lungs to expand. Chest tube is placed in the pleura to remove the air while the water seal the tube so the air from atmosphere won't go inside.
Answer: Transcription occurs along 3' to 5' template to form MRNA in the 5' to 3' direction.
Explanation:
Transcription is the process by which a DNA sequence is copied into a RNA by the action of the enzyme RNA polymerase. It is the first step of DNA gene expression. RNA polyerate link nucleotides together to form RNA strand. Transcription occurs along 3' to 5' template forming mRNA at 5' to 3' direction.
The answer is saturated fats.
Food, medicine, soil holders, decoration, and building(straw is an example) are some that I can think of