Answer:
the 2 pne pretty sure its that 
 
        
             
        
        
        
Endangered Species Act of 1973
        
             
        
        
        
Answer:
To test the presence of protein in the food substance which gives a blue-to-purpule colour 
 
        
                    
             
        
        
        
Answer:
b. Even though the DNA sequence changed, the sequence still codes for the same amino acid, so no change in phenotype will occur.
Explanation:
There is redundancy in the genetic code. That means that different codons can code for the same amino acids, so some mutations do not change the amino acid sequence of the protein. 
Here, the amino acid is unchanged with the mutation.
If the amino acid sequence of the protein is the same, then the protein is not changed, so there will be no change in the phenotype
 
        
             
        
        
        
Answer:
Option (3).
Explanation:
Mark recapture method is used for the estimation of population size of an area. The individuals are identified by  some mark on them. The formula of mark recapture method is 
N = M * C/ R
Here, N is the number of the individuals, M is the individuals are marked and captured, C is the individual captured again with mark or non mark and R is recaptured marked individual.
The individual with 200 population, 20 are marked for the first time represent the large population size.
Thus, the correct answer is option (3).