Answer:
They use a hard shell, but not hard enough though because we humans can get through them hehehe
 
        
             
        
        
        
Answer:
Expecting that the skeletal muscles of frog is like human beings (as they are vertebrates). The end drawn from this supposition that will be that the A band (thick fiber) stays unaltered in any event, during compression and the I band (flimsy fiber) contracts. So from the given data following outcomes are acquired;  
A band before = [2.0um]  
I band before = [2.0um]  
A band after = [2.0um]  
I band after = [1.0um]
 
        
             
        
        
        
Answer:
That would be organism, species, and then community.
Explanation:
 
        
             
        
        
        
Answer:
Tentacles have specialised stinging cells called nematocysts. They use these to immobilise their prey so that the tentacles are then able to move the food into the mouth.
Explanation: