Answer:
Higher
Explanation:
Molecules such as oxygen move from a higher concentration to a lower concentration across a semi-permeable membrane. This process is called simple diffusion.
Therefore, for oxygen to leave the alveoli and enter the blood, there would need to be a higher concentration of oxygen inside the alveoli and a lower concentration of oxygen in the blood. 
 
        
             
        
        
        
Molecule is formed when atoms combine by covalent bonding. The molecule may be polar or non polar.
        
             
        
        
        
Being born a few days before your due date shouldn’t cause a big difference in your health. To gain weight you should try to eat thing high in protein, healthy fats, and some carbs. Most people try to gain weight by eating foods with a lot of saturated fat (is potato chips) but try to maintain a diet with a good calorie intake. 
However I am not a professional and if you are worried about your weight, go to a nutritional to see what meal plan they will give you 
This is what I try to eat, I am 100 pounds, 5.2, female.
Eggs (taste terrible in my opinion but are extremely nutritious) for breakfast 
Salad with chicken for one meal 
Meat dish with rice, or vegetables, sometimes spaghetti 
        
             
        
        
        
Answer:
A good scientific question has certain characteristics. It should have some answers (real answers), should be testable (i.e. can be tested by someone through an experiment or measurements), leads to a hypothesis that is falsifiable (means it should generate a hypothesis that can be shown to fail), etc.
<h3>Hope it helps you.</h3>