The evaporation of water present inside plant cells into vapour through leaf stomata is primarily called what?

Correct answer: Transpiration

Correct answer: B, transpiration. Plants absorb water mainly through their roots, and some of this water travels through the xylem to leaves. In the leaf, water evaporates from moist internal cell-wall surfaces and then diffuses out through stomata, which are tiny pores commonly present in the epidermis. This loss of water vapour from the aerial parts of a plant is called transpiration. Option A, percolation, describes water moving downward through soil or porous material. Option C is a general movement of particles from higher concentration to lower concentration; diffusion helps vapour leave the leaf, but the complete plant process is called transpiration. Option D, guttation, is the release of liquid water droplets, usually through hydathodes, not vapour through stomata. Cue: transpiration is plant water loss as vapour; guttation is liquid droplets.