Answer:
mitochondrion becoz it is a membrane bounded organelle which is only present in eukaryotic cell
 
        
             
        
        
        
Because nowadays, many horses are domesticated, and food they would have eaten in the wild, they don't usually eat anymore. They have learnt to adapt to eating other foods, like hay, that require molars to ingest. This is why over time, their tooth structure has changed.
        
             
        
        
        
Answer: Permable
Explanation: Because things passes through faster
 
        
             
        
        
        
Answer:
It passes through a structure called Ostia that makes the valved chambers for hemolymph to flow. From the Ostia into the aorta and then the hemolymph is flushed out in front of head. 
 
        
             
        
        
        
Endoplasmic Reticulum is the network of passageways functions to carry materials from one part of the cell to the other.