Question 12
Original source text (the original panel preserves all diagram labels, tables and choices):
Plant transpiration is the process by which
water is lost from the leaves to the
atmosphere, primarily through stomata. The
rate of transpiration is influenced by external
factors like temperature, humidity, and wind
speed and internal factors such stomatal
density and cuticle thickness.
Which of the following adaptations will help plants retain moisture by reducing
rate of transpiration especially in hot and dry environment?
A. Increased leaf surface area
B. Sunken stomata
C. Thin cuticle on the surface of leaves
D. Absence of leaf hairs or trichomes

Plant transpiration is the process by which
water is lost from the leaves to the
atmosphere, primarily through stomata. The
rate of transpiration is influenced by external
factors like temperature, humidity, and wind
speed and internal factors such stomatal
density and cuticle thickness.
Which of the following adaptations will help plants retain moisture by reducing
rate of transpiration especially in hot and dry environment?
A. Increased leaf surface area
B. Sunken stomata
C. Thin cuticle on the surface of leaves
D. Absence of leaf hairs or trichomes
