Yes, a tomato is a fruit. Anything with seeds is a fruit. :)
        
                    
             
        
        
        
Answer:
Colin MacLeod, and Maclyn McCarty showed that DNA (not proteins) can transform the properties of cells, clarifying the chemical nature of genes.
Explanation:
 
        
             
        
        
        
Answer:
The energy which is taken by consuming food to perform different functions such as movement, exercise, breathing and thinking etc. 
Explanation: 
The energy from the food is released in the process of respiration. In respiration, energy is released in the form of ATP due to the breakdown of glucose molecules in the mitochondria of the cell. This energy is used by the body in different activities. 
 
        
             
        
        
        
B
The other problems are not as easily solved; whereas, data collection over long periods of time is possible and was already done in the past, eg temperature and weather patterns. Therefore, this is the easiest limitation to overcome.