The answer is D. They carry out specific functions for a whole organism
        
                    
             
        
        
        
A gene 
 is something that is passed onto you, pretty much like this: My dad had blonde hair and green eyes, and that's what I got. My mom was Brown haired and blue eyes. I got her eyebrows and mouth. Get what im saying? It's something that is passed down to you.
        
                    
             
        
        
        
The description describes metaphase, so the next step is anaphase
        
                    
             
        
        
        
Answer:
By pulling down rocks and particles.
Explanation:
For example, in a cliff, where rocks are being pulled down by gravity. Their particles and small pieces of rock are forced to fall apart, slowly eroding down any rock or sediment.
 
        
             
        
        
        
Answer:
Biogas is composed mostly of methane (CH4), the same compound in natural gas, and carbon dioxide (CO2).
Explanation: