What will be the difference btw tentative and final merit list?

Which of the following is put into Anaerobic digester for further sewage treatment?
Option: 1 Primary sludge
Option: 2 Floating debris
Option: 3 Effluents of primary treatment
Option: 4 Activated sludge  

In relation to gross primary productivity and Net primary productivity of an ecosystem which one of the following statements is correct?
Option: 1 Gross primary productivity is always less than net primary productivity 
Option: 2 Gross primary productivity is always more than net primary productivity 
Option: 3 Gross primary productivity and net primary productivity  are one and the same
Option: 4 There is no relationship between Gross primary productivity and net primary productivity.  

Some dividing cells exit the cell cycle and enter the vegetative inactive stage. This is called the quiescent stage (G₀). This process occurs at the end of:
Option: 1 M phase
Option: 2 G₁ phase
Option: 3 S phase
Option: 4 G₂ phase

The enzyme enterkinase helps in conversion of:
Option: 1 protein into polypeptide
Option: 2 trypsinogen into trypsin 
Option: 3 caeinogen into casein
Option: 4 pepsinogen into pepsin  

Which of the following is not an attribute of a population?
Option: 1 Sex ratio
Option: 2 natality
Option: 3 mortality
Option: 4 species interaction