Answer:
Mainly, the number of genes that control traits.
Explanation:
Polygenic inheritance does not follow Mendel's law of dominance. According to Mendel the dominant trait will mask the recessive trait however, this is not always the case. Polygenic inheritance states that traits are controlled by two or more genes and is also dependent on the environment. 
Let's take skin color for example. A fair-skinned person will have a child with a dark-skinned person. 
Mendelian inheritance would assume that the offspring would either be fair or dark only. 
Polygenic inheritance would assume that the offspring would be either fair, dark, or a tone in between, depending on the environment they are in as well. 
Hope you understood it. 
 
        
             
        
        
        
Answer:
El proceso de la fotosíntesis se divide en dos etapas, la primera llamada "Lumínica" o fotodependiente y la segunda "Oscura" o fotoindependiente.
Explanation:
 
        
             
        
        
        
Answer:c) glucose
Explanation: The complete balanced chemical equation is C6H12O6 + 6O2 --> 6CO2 + 6H2O + Energy. 
The equation above represents cellular respiration. During respiration, one molecule of glucose (C6H12O6) is broken down in the presence of six molecules of oxygen (O2) to produce six molecules of carbon dioxide (6CO2), six molecules of water (6H2O) and energy (ATP).
 
        
             
        
        
        
Answer:
b. intracellular fluid moves to the outside of cells
Explanation:
The presence of an excess of sodium ions in the extracellular fluid would make it hypertonic with respect to the intracellular fluid. The concentration gradient would drive the intracellular fluid towards the outside of the cell to balance the concentration of the fluids on either side. The passive movement of fluids occurs across the cells and is driven by the concentration gradient only. The biological membranes are permeable for fluid movement such as the movement of water across it.
 
        
             
        
        
        
Answer:
B
Explanation:
Stratosphere,absorbs rays of damaging ultraviolet light from the sun