Light energy is converted into chemical energy through the process of photosynthesis. 
        
             
        
        
        
Answer:
Yes, the similarity of embryos across species provide evidence for evolution. The similarity of the embryos indicates that they evolved from the same common ancestor, the embryos at letter A clearly indicates this.   
Explanation:
 
        
             
        
        
        
A.Evaporation 
B.Condensation 
C.precipitation 
D.Groundwater
        
                    
             
        
        
        
Answer:
Epistasis
Explanation:
In epistasis, the interaction between genes is inimical, such that one gene masks or interferes with the expression of another. “Epistasis” is a word coined of Greek roots that mean “standing upon.” The alleles that are being masked or silenced are said to be hypostatic to the epistatic alleles that are doing the masking. The cause of the biochemical basis of epistasis is a genetic pathway in which the expression of one gene is dependent on the function of a gene that precedes or follows it in the pathway.
The example of epistasis given is the pigmentation of mice. we were told that "if a mouse has two recessive alleles for coat color,  it is always albino no matter what the genotype of other genes involved in coat color" 
Let say recessive allele (rr), it is always albino irrespective of other type of other genes, this is true in the stance that epistasis can be reciprocal such that either gene, when present in the dominant (or recessive) form, expresses the same genotype.