Answer:
25%
Explanation:
The child only comes out as homozygous dominant (YY) for the trait in 1/4 boxes in the Punnett Square. This translates to the child having a 25% chance of being homozygous dominant for the trait. 
 
        
                    
             
        
        
        
Answer:
The correct answer is c) are plant cells.
Explanation:
The cells cannot be animal cells, because they have not wall (this kind of cells has only plasma membrane). In addition, eukaryotic cells have membrane-bound organelles (which are surrounded by a phospholipids membrane, such as endoplasmatic reticulum, Golgi apparatus, lysosomes, etc.), whereas prokaryotic cells lack them. Since plant cells are eukaryotic and bacterial cells are prokaryotic, the cells you are looking are plant cells. 
 
        
             
        
        
        
The structure that serves as the cell's boundaries from its environment is known as the CELL MEMBRANE.  It keeps the bad things from coming in, and releases waste out into the environment.
<span>Answer: cell membrane</span>
        
             
        
        
        
Explanation:
In a food chain, only 10% of energy is transferred from one trophic level to another trophic level. If the energy produced at the producer level is 1000 J, then the energy available at the primary consumer level will be 100 J and energy available at the secondary consumer level will be 10 J.
 
        
             
        
        
        
Most organisms rely on the sun as a primary source of energy