D, active transport because that protein uses atp to cross channels and active transportation is the only form of movement that’s used atp to move
        
             
        
        
        
Answer:
By preventing the synthesis of DNA halting cell growth. 
Explanation:
Fluorouracil and methotraxate prevent the synthesis of the neucleoside Thymidine thus preventing DNA replication and elongation. Methotraxate has a structure analogous to Folic acid which is important for thymidine synthesis. Thus, it acts as a competitive inhibitor on dihdrofolate reductase an enzyme that is essential for tetrahydrofolate formation, a folic acid derivative. 
Fluorouracil acts by inhibiting thymidylate synthase which catalyses an essential step in Thymidine synthesis.
 
        
             
        
        
        
Answer:it is a
Explanation:because it just makes sence.lol
 
        
             
        
        
        
Answer:
Arteries connect to capillaries and veins don't connect to capillaries
Explanation:
Actually both are connected by capillaries
 
        
             
        
        
        
Answer:
Don’t quote me, but A.
Explanation:
There is a bug, called a Water Strider, that use surface tension to ‘walk on water.’