FTCE Subject Area K-6 Practice Exam 2025 - Free K-6 Practice Questions and Study Guide

The experiment demonstrates photosynthesis as the correct answer because it illustrates how light, specifically sunlight, impacts plant growth. In this scenario, the group of plants placed in the sunlight will be able to carry out photosynthesis, a process where plants convert light energy into chemical energy to produce food (glucose) from carbon dioxide and water.

In contrast, the plants placed in the dark lack the light necessary for photosynthesis, leading to stunted growth or potential death, highlighting the critical role that light plays in this process. This experiment effectively shows students the importance of sunlight for the survival and growth of plants, making it a clear demonstration of photosynthesis.

The other options, such as respiration, transpiration, and germination, pertain to different biological processes. Respiration refers to how plants convert glucose into energy, transpiration involves the movement of water through plants, and germination is the process of a seed developing into a new plant, none of which are the primary focus in this experiment.