Answer:
The intervertebral discs of the spinal column and 'long bones' such as the femur and tibia.
Explanation:
 
        
             
        
        
        
Answer:
For 1. The virus starts in the lungs. From there, the virus invades the bloodstream and spreads to the skin, intestines, lungs, kidneys, and brain. The virus activity in the skin cells creates a rash that starts as macules (flat, red lesions). 
The symptoms after actually catching the virus
 Pain in the back or muscles
 rashes, small bumps, blister, scab, or scar
 You can have fever, malaise, or chills
headache or vomiting Is also pretty common. I hoped this helped bro 
Explanation:
 
        
             
        
        
        
Plants use and produce both oxygen and carbon dioxide.
        
             
        
        
        
Um i think the definition for back-grounding is an intermediate stage sometimes used in cattle production which begins after weaning and ends upon placement in a feedlot. I think i am correct i am 84% sure. Mark brainiest if this helped. 
Have a nice day or night
 
        
             
        
        
        
Answer:
when an object smashed into early Earth. .Explanation: no explanation just the answer