Question

$C_4$ plants are adapted to

• A. Temperate humid climate
• B. Tropical humid climate
• C. Temperate dry climate
• D. Tropical dry climate

Answer 1

The correct option is D Tropical dry climate

$C_4$ plants are adapted to dry tropical regions. Sugarcane, Maize, Sorghum, etc., are the examples of $C_4$ plants. In these plants, the Calvin cycle occurs in the bundle-sheath cells. $C_4$ plants have a special type of anatomy called Kranz anatomy. They can tolerate higher temperatures because of Kranz anatomy. 'Kranz' means wreath and is a reflection of the arrangement of cells. Kranz anatomy is characterized by having a large number of chloroplasts, grana are absent, thick walls impervious to gaseous exchange and no extracellular spaces.