B positive patients can receive blood from B positive, B negative, O positive and O negative donors.
 
        
             
        
        
        
Cells undergo mitosis because there must be a process in which the nucleus is divided in order for there to be a successful reproduction for cells.
        
                    
             
        
        
        
Answer: It means to guide and regulate chemical and physical parameters to keep your body or environment in a constate state for proper functioning.
Explanation: This is called homeostasis. The body has systems in place to monitor its components such as cells, organs and any other molecule needed to maintain life and good health. The body needs to maintain its temperature at 37°C, pH of blood at 7.4, water balance, osmotic pressure, growth rate and tissue repairs whenever it dictates the need, danger of infection or injury. 
All of these form an integral part of a healthy living organism and it needs to always be stable, regulated and monitored. This is called maintaining homeostasis.
 
        
             
        
        
        
Answer:
rex was covered in a coat of downy feathers
Explanation:
Some mammals did have hair but T. Rex mostly had feathers 
 
        
                    
             
        
        
        
Answer:
Chromosome 17 is made of over   million (80) base pairs.
Approximately how many genes are found on chromosome 17?  
1600
Explanation:
took on edge2020 and got it right 
hope this helps :)