Which of the following in sewage treatment remove suspended solids?

• Tertiary treatment

• Secondary treatment

• Primary treatment

• Primary treatment

Which of the following species are restricted to an area?

• Sympatric species

• Sibling species

• Allopatric species

• Endemic species

Which one of the following combination is incorrect?

• Rio convention → Air pollution

• Kyoto protocol  → Climate change

• Montreal Protocol → Ozone depletion

• Ramsar Convention → Wetland conservation

Soil salinity is measured by

• Porometer

• Calorimeter

• Conductivity meter

• Potometer

IUCN stands for 

• Indian Union for Conservation of Nature

• International Union for Conservation of Nature

• Indian Union of Chemical Nomenclature

• International Union for the conservation of Nutrients