111. As the air temperature increases, with no addition of water vapour to the air, the relative humidity will:

A. Remain the same
B. Increase
C. Decrease
D. Increase until it becomes equal to the dew point temperature
✅ The correct answer is option D.
As air is cooled and no moisture is added, the relative humidity will increase until the air reaches saturation (100% RH). The temperature of the air when this occurs is called the dew point temperature.

114. ____________ is one of the most endangered species of Indian birds

A. Bee eater
B. Paradise fly catcher
C. Owl
D. The great Indian bustard
✅ The correct answer is option D.
The Great Indian Bustard is a most endangered species of bird found only in India and adjoining region. Bustard is one of the largest flying species of bird with weight up to 15 kg and about 1 m tall from the ground.

115. An ecosystem gradually merges with an adjoining one through a transitional zone is called the ______________

A. Ecological niche
B. ecological footprint
C. ecotone
D. shore effect
✅ The correct answer is option C.
An ecotone is a transition area between two biomes. It is where two communities meet and integrate. It may be narrow or wide, and it may be local (the zone between a field and forest) or regional (the transition between forest and grassland ecosystems).

116. Red Data Book Provides data on

A. Red flowered plants
B. Red colored fishes
C. Lists of plants and animals
D. Endangered plants and animals
✅ The correct answer is option D.
The Red data book is the state document established for documenting rare and endangered species of animals, plants and fungi. This book provides central information for studies and monitoring programmes on rare and endangered species and their habits.

119. Suppose saturated polar air has an air temperature and dew point of -10o C, and unsaturated desert air has an air temperature of 35o C and a dew point of 10o C. The desert air contains ______ water vapour and has a ________ relative humidity than the polar air.

A. More, lower
B. More, higher
C. Less, lower
D. Less, higher
✅ The correct answer is option A.
Suppose saturated polar air has an air temperature and dew point of -10o C, and unsaturated desert air has an air temperature of 35o C and a dew point of 10o C. The desert air contains more water vapour and has a relative humidity than the polar air.