Env, Ecology, UPSC PYQ

1

“Biorock technology” is talked about in which one of the following situations?

Restoration of damaged coral reefs

Development of building materials using plant residues

Identification of areas for exploration/extraction of shale gas

Providing salt licks for wild animals in forests/protected areas

2

The “Miyawaki method” is well known for the:

Promotion of commercial farming in arid and semi-arid areas

Development of gardens using genetically modified flora

Creation of mini forests in urban areas

Harvesting wind energy on coastal areas and on sea surfaces

3

“If rainforests and tropical forests are the lungs of the Earth, then surely wetlands function as its
kidneys.” Which one of the following functions of wetlands best reflects the above statement?

The water cycle in wetlands involves surface runoff, subsoil percolation and evaporation.

Algae form the nutrient base upon which fish, crustaceans, molluscs, birds, reptiles and mammals thrive

Wetlands play a vital role in maintaining sedimentation balance and Soil stabilization

Aquatic plants absorb heavy metals and excess nutrients.

4

Which of the following are nitrogen-fixing plants?

1. Alfalfa
2. Amaranth
3. Chickpea
4. Clover
5. Purslane (Kulfa)
6. Spinach

Select the correct answer using the code given below:

1, 3 and 4 only

1, 3, 5 and 6 only

2, 4, 5 and 6 only

1, 2, 4, 5 and 6

5

In the nature, which of the following is/are most likely to be found surviving on a surface without soil? (1) Fern (2) Lichen (3) Moss (4) Mushroom Select the correct answer using the code given below:

1 and 4 only

2 only

2 and 3

1, 3 and 4