What leads to an increase in the specialization of laborers

There are 25 elements found in living things. how many of these elements are found in some organisms but not all? 1 , 6 , 19 , 25

Rational ignorance suggests that a. voters are ignorant on issues that are not of special interest to them b. voters do not pursue information about issues before voting c. low voter turnout is due to a lack of understanding of the platforms of each political party d. voters are uninterested in the electoral process

Marcy tests a solution with a strip of blue litmus paper. the paper turns red. the solution is acidic basic neutral