Question

Leaves are mostly thick and small to minimize the transpiration in ________.
A. Thorn forest and scrubs
B. Tropical deciduous forest
C. Montane forest
D. Montane forest

Answer 1

Hint: In regions which receive less than 70 cm of rainfall or Leaves of desert plants and trees are mostly thick and small to minimize transpiration.

Complete answer:
In the process of transpiration, water moves through a plant and evaporates from aerial parts, like leaves, stems and flowers. Transpiration accounts for many of the water loss by a plant by the leaves and young stems.

Trees in Thorn forests and scrubs have mostly thick and little leaves to minimize water loss due to transpiration. In this sort of vegetation, trees are scattered and have long roots penetrating deep into the soil so as to get moisture.
Tropical deciduous forests occur in regions with heavy rainfall for part of the year followed by a marked dry season.these forests are broad-leaf forests because of the wide, flat leaves on the trees. Trees in tropical deciduous forests lose their leaves within the season and regrow them within the rainy season.
On the slopes of mountains Montane ecosystems are found. Evergreen sort of vegetation is prevalent in montane forest.
Dense montane forests are common at moderate elevations, due to moderate temperatures and high rainfall.

Therefore the correct answer is (A). i.e., Thorn forest and shrubs.

Note: A thorny forest is a dense, scrub-like vegetation feature of dry subtropical and warm temperate areas with a seasonal rainfall averaging 250 to 500 mm.The main trees of this vegetation are Acacia, Palms, and Cacti. Other important trees are Khair, Babul, Palas, Khatri, and Kajuri.