Answer:
<em>The correct option is B. Alleles</em>
Explanation:
The punnet square can be described as a diagram which shows the outcomes of a cross. A punnet square will help us know what will be the probability for a particular trait to occur in the offsprings.
Genes might have the same or different alleles. If the alleles for a gene are similar in an organism, the organism is said to be homozygous for the trait. If the alleles are different, then the organism is termed as heterozygous. 
A dominant allele is the one which which suppresses the effect of the recessive allele. A recessive allele gets masked by a dominant allele. 
 
        
             
        
        
        
Answer:
The correct answer is A: Simple cuboidal epithelium. 
Explanation:
Simple Cuboidal Epithelium: These epithelia are formed by a single layer of cuboidal cells, that are <em>as </em>tall as they are wide. They have a rounded, central nucleus.  Occasionally these cells present cilia, flagella or <em>microvillus</em> in their apical surface, lining the lumen. Microvillus are fingerlike projections.  This epithelium can be found for example in the proximal convolutes renal tubule. 
 
        
             
        
        
        
Answer:
Industries cause enormous water pollution: By directly discharging their untreated effluents into water bodies like rivers and lakes. By letting their polluting effluents flow onto land so that they get absorbed into the soil and pollute underground water.
 
        
                    
             
        
        
        
D is the answer. Since it’s caused by a subduction.