The correct answer is:
<h3>a.
Entropy increases going from one trophic level to another.</h3><h3>Explanation:</h3>
Entropy progress going from one trophic level to another. Entropy is a division for the disorderliness of a system. As the trophic level move to the other, energy is lost so more chaos occurs which inflates the entropy.
 
        
                    
             
        
        
        
Answer:
<em>The correct option is B) as the light colored moths were seen and eaten, the allele for dark colour became more prevalent in the population.</em>
Explanation:
The process of natural selection tends to favour those organisms which are better adapted to live in an environment. Evolution changes the allele frequencies of a population over time depending on the traits favoured by natural selection.
Before the industrial revolution, the colour of the trees was lighter and hence, the light coloured moths were better adapted to such environments as they could hide from predation. After the industrial revolution, the colour of the woods of trees became darker. The light coloured moths were no more able to hide from their predators and hence their population declined. 
 
        
             
        
        
        
I'm pretty sure that its the 3rd answer
 
        
             
        
        
        
Answer: Chlorine-36 (^36Cl) is an isotope of chlorine. 
Explanation: Chlorine has two stable isotopes and one naturally occurring radioactive isotope, the cosmogenic isotope ^36Cl.
 
        
             
        
        
        
Answer: Transcription factors
Explanation:  
The dioxin enters the blood stream and the fat cells and liver cells store it.
While moving inside the cell the dioxin binds to the protein called Aryl hydrocarbon which then binds to the second receptor.  
The complex is then carried to the nucleus of the cell. This tends to on and off certain genes.
This turning on and off of the genes in the cell can lead to serious diseases like cancer, decreased immune function, et cetera.