Answer:
The vertebrate Brain is a collection of motor neurons connected to each other and other types of neurons in the head throughout the body is True.
Explanation:
 
        
                    
             
        
        
        
The correct answer is C. DNA and RNA
        
                    
             
        
        
        
Answer:
C.
Explanation:
Here is a defintion of the immune system:
The major function of the immune system is to protect the host from environmental agents such as microbes or chemicals, thereby preserving the integrity of the body.
C. matches that definition nicely.
:)
 
        
                    
             
        
        
        
Answer:
The earth is made up of three different layers: the crust, the mantle and the core. This is the outside layer of the earth and is made of solid rock, mostly basalt and granite. There are two types of crust; oceanic and continental. Oceanic crust is denser and thinner and mainly composed of basalt. The inner core is made from Iron and Nickel. 
Explanation: