Answer:
1. Both Hydrogen should be positive and Oxygen is negative. I can't tell which photo that would represent however my best guess would be #2.
2. D
3. A
 
        
             
        
        
        
The intermediate color or rather condition, in this case "roan", is a result of two alleles being codominant. Codominance occurs when the phenotype (or the physical expression of the gene) of a heterozygote individual expresses both the alleles in a pair of genes. In the given situation, both parents are homozygotes. 
        
             
        
        
        
Answer:
C. To confirm that the alternative fuel is cleaner than fuels currently used
Explanation:
The current fuels from mining, cutting down trees and even transportation is bad for the atmosphere. These fuels cause climate change which could potentially bring a lot of dangers. The reason scientists would conduct research on a newly alternative fuel is so that the fuel would be a lot more cleaner which could prevent the dangers that are to come.
 
        
             
        
        
        
Answer:
The elements in carbohydrates are carbon C, hydrogen H and oxygen O.
The elements in proteins are carbon C, hydrogen H, oxygen O and nitrogen N
The elements in lipids contain carbon C, hydrogen H, oxygen O, nitrogen N and phosphorus P.
The elements in fats/oils contain carbon C, hydrogen H and oxygen O
Explanation: