All the populations living and interacting within a particular geographic area make up a biological (or biotic) community. The living organisms in a community together with their nonliving or abiotic environment make up an ecosystem.
        
             
        
        
        
...that seemed to reflect the size of seeds the birds ate.
 
        
             
        
        
        
Answer: The noble gases are a group of chemical elements that make up Group 18 on the periodic table. These gases all have similar properties under standard conditions: they are all odorless, colorless, monatomic gases with very low chemical reactivity.
 
        
             
        
        
        
The answer would be C: The gulf sturgeon population will decline due to loss of habitat
        
             
        
        
        
Atoms sharing valance electrons