In genetics when an organism is heterozygous that means that it contains 2 different alleles for a specific gene, heterozygous refers to the genotype 
Homozygous means the organism carries 2 of the same alleles.
For example there are two alleles for the gene of eye color 
B- is the dominant allele for brown eyes 
b- is the recessive allele for blue
So if a person's genotype is like Bb then he is heterozygous 
but if he is like BB or bb then he is homozygous 
        
             
        
        
        
Acceleration is the answer
 
        
             
        
        
        
Fungi join bacteria as the primary decomposers in different ecosystems. They feed on the organic remains of dead plants. They release special enzymes that break down lignin, a structurally complex substance in wood. Decomposing organic matter is considered by ecologists as the major ecological role of fungi.
 
        
             
        
        
        
Answer:
Meiosis
Explanation:
Mitosis creates an identical set of daughter cells to the parent cells through asexual reproduction but meiosis creates a set of sex cells that are identical to each other but not to the parent cell and this is through sexual reproduction.
 
        
             
        
        
        
Answer: a change in energy state occurs. The answer is dark or opaque - not able to be seen through. 
Explanation:
The absorption of light makes an object dark or opaque to the wavelengths or colors of the incoming wave: Wood is opaque to visible light. Some materials are opaque to some wavelengths of light, but transparent to others. Glass and water are opaque to ultraviolet light, but transparent to visible light.