Which one of the following plants exhibits both C3 and C4 pathways?

A. Zea mays

B. Oryza sativa

C. Mesembryanthemum crystallinum

D. Arabidopsis thaliana

Answer: Option C

Solution(By Examveda Team)

In physiology and metabolism, Mesembryanthemum crystallinum is the plant that exhibits both C3 and C4 pathways. This plant is commonly known as common ice plant or crystalline ice plant. It is a halophytic plant that has the ability to perform both C3 and CAM (Crassulacean Acid Metabolism) photosynthesis pathways. The C3 pathway is predominant under normal conditions, while the CAM pathway is utilized under conditions of high salinity or water stress. Therefore, Option C is the correct answer.