Question : In which of the following ecosystems benthic zone is found?

Option 1: Freshwater ecosystem

Option 2: Saltwater ecosystem

Option 3: Tundra ecosystem

Option 4: Forest ecosystem

Question : Under which strata do trees fall?

Option 1: Second vertical

Option 2: Top vertical

Option 3: Middle vertical

Option 4: Bottom vertical

Question : Which of the following is an artificial ecosystem?

Option 1: Aquarium

Option 2: Biosphere reserve

Option 3: Sanctuary

Option 4: National park

Question : The ratio of the area of two isosceles triangles having the same vertical angle (i.e. the angle between equal sides) is 1 : 4. The ratio of their heights is:

Option 1: 1 : 4

Option 2: 2 : 5

Option 3: 1 : 2

Option 4: 3 : 4

Question : The pyramid of numbers in an aquatic ecosystem is _________.

Option 1: always inverted

Option 2: always upright

Option 3: partially inverted

Option 4: spindle-shaped