Vomiting is a common symptom of the stomach flu - it starts a few hours after you're exposed to the virus so there isn't a certain amount of times you will vomit but drinking plenty of fresh, clean water will help you keep hydrated! :)
Firstly they are not membranes and they are villi's which increase the surface area during digestion
Answer:
A. movement of molecules across a semipermeable membrane against a concentration gradient with a protein
Answer:
The correct answer would be nucleotide.
Explanation:
