You are watching a video with some fancy time-elapsed photography with close-ups showing water evaporating from the leaves of a plant. You realize that you are observing the process of ____ .

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BlackTom AI · Accepted Answer

Before selecting an option, let's examine what is happening in the video: water is moving from the leaf surfaces into the air as vapor, which is a loss of water from the plant through the leaves.
Option a: transpiration. This term exactly describes the loss of water vapor from plant surfaces, especially through stomata in the leaves, often visible as steam in time-lapse imagery. This aligns with the observed process.
Option b: condensation. Condensation is the process of water vapor turning into liquid water, such as dew forming on surfaces. The video shows water leaving the leaf as vapor, not vapor forming on a surface, so this is not correct for the described scenario.
Option c: symbiosis. Symbiosis refers to a close ecological relationship between different species, such as mutualism or parasitism. It has no direct relation to the evaporation of water from a plant, so this choice is unrelated to the described process.
Option d: selection pressure. Selection pressure is an evolutionary concept describing how environmental factors influence which traits are favored over generations. It does not describe a short-term physiological process like water loss from leaves, so this is not applicable here.
Option e: cohesion-tension. The cohesion-tension theory explains how water is drawn up through the xylem due to cohesive and adhesive forces as a column of water. While related to water transport within the plant, it is not the labeled process of water vapor loss from leaves seen in the video, so it is not the best match for the described observation.
Option f: evaporative cooling. Evaporative cooling refers to the cooling effect when water evaporates, which can occur in leaves, but the video emphasizes the observable evaporation itself rather than the cooling consequence. While related, it does not define the process being observed as directly as transpiration does.

BIO 181 (001&002) FALL 2025 FA25: Cumulative Exam 4 covers the most important content from Units 1-4: You can do this!!! : ) [Grade is out of 150/900 pts, the same am't of pts for the active learning "easy points" classwork.]

You are watching a video with some fancy time-elapsed photography with close-ups showing water evaporating from the leaves of a plant. You realize that you are observing the process of ____ .

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