Answer:
the answer is A
Explanation:
just got done with that unit
 
        
                    
             
        
        
        
1) D chromosomes
2) B a double helix
3)A chromosomes are made of DNA
4)A genes
        
             
        
        
        
Answer:
Plants would be unable to grow and produce oxygen for the animals.
Explanation:
Sunlight, which supports plants, is considered an abiotic factor. If there were no sunlight, plants wouldn't be able to grow, which means no oxygen for many living things found in that specific ecosystem. In other words, that ecosystem would become uninhabitable.
 
        
             
        
        
        
Answer:
B. Fire let humans increase their energy use tenfold
Explanation:
Trust :)))
 
        
                    
             
        
        
        
The cerebellum is the answer.