Responsive cells have a certain receptor for a particular hormone.
        
                    
             
        
        
        
Explanation:
A student of ecology researched about the low growth of algae in the Big Moose lake as compared to the Brant lake, though Big Moose lake has higher  level of nitrogen and nutrients in it. 
Nitrogen and phosphorous are an important element for the growth of algae in water bodies but in presence of pollutants in  the water bodies and low oxygen content, the algae grows in slower rate. Besides, slower growth of algae may also affected by the acid rain that happens near Moose lake, which is harmful for algae growth due ti the presence of sulphur.
 
        
             
        
        
        
Answer:
If two heterozygous pea plants are crossed with yellow round seeds, the resulting progeny mostly show the dominant phenotype.
Explanation:
Plants with two different alleles of a gene are heterozygous. As all the heterozygous offspring are yellow, then the yellow allele must be dominant over the recessive green allele.
        Y              y
Y     YY          Yy
y      Yy           yy
 
        
             
        
        
        
Answer: The mass number is 13
Explanation:
Mass number = Protrons + neutrons; 
While Atomic number = Number of neutrons 
Therefore, if the atomic number of nitrogen is given as 7, then its Protrons = 7
So, mass number = 7 + 6 = 13
 
        
             
        
        
        
Answer:
en los jugos pancreáticos hay bicarbonato de sodio que neutraliza la alta acidez.