Answer:
Water vapor
Explanation:
Clouds are formed when water evaporates into water vapor.
 
        
                    
             
        
        
        
Answer:
Read the Explanation below.
Explanation:
1. I agree with the claim because you can see overall there is no difference in plant growth or variation if a plant has 30 ml of water or none at all.
2. I would measure the change in growth over a greater period of time to get a more accurate data set.
 
        
             
        
        
        
Just like humans and other animals, pathogenic bacterias also has the capability to evolve.
These pathogens usually come to life as soon as they enter a host. When you use antibiotics, the majority of them will die, but several of them could survive.
When these survivals replicate, it will creates more bacterias that has higher immune towards antibiotics compared to normal bacteria
        
                    
             
        
        
        
Answer: Resource partitioning 
Explanation:
In order to make organisms of different species (competitors) coexist, limited resources are to be divided with a ecological area. 
Organisms of same species could be made to live together, so as to reduce wastage of limited resources 
 
        
             
        
        
        
Answer:
Dark matter
Explanation:
Without dark matter the world can not be held together