Answer:
I believe the correct answer is  both involve proteins in the cell membrane. 
Explanation:
This is because Facilitated diffusion does not require any energy to transport molecules, while Active transport requires ATP. Facilitated diffusion transports molecules from an area of higher concentration to an area of lower concentration (or down a concentration gradient). Active transport moves molecules from an area of lower concentration to an area of higher concentration (or up a concentration gradient). Answer choice A is the only choice that makes sense.
Hope this helps, 
♥<em>A.W.E.</em><u><em>S.W.A.N.</em></u>♥
 
        
             
        
        
        
It's A, a limiting factor is something that constrains the population size
        
             
        
        
        
There are many forms of VIF and each forms are made for different purposes. basically, you just extract a female egg and a sample of the male sperm, bad sperm can be separated via by adding specific chemicals. The sperm will then be transferred into the egg and the egg is transferred into the women. (This is ICSI) There are other forms under the category of IVF but this is one of the example. (ICSI only deals with male infertility)
        
                    
             
        
        
        
I will try to answer at the best of my ability.
She may have Gastritis.
I hope this helps, and if it is wrong, I am truly sorry.
 
        
             
        
        
        
Asthma is a condition which is characterized by
attacks of difficult breathing and wheezing.
<span>It is a condition related to lung disease in
which there is inflammation in bronchial tubes they become narrow, bronchial
tubes are the passageway through which air enters and leave the lungs. So when
it becomes narrow, it causes difficulty in breathing and sometimes it causes
severe attacks.</span>