All plants have specific environmental requirements. To meet these needs, plants can adapt. Plants can change their physical structure, their behavior (how they react to the environment) or their physiology (down to cellular adaptations).
LIGHT Since sunlight is essential to drive the photosynthesis process that is performed in foliage, plants have adapted in a variety of ways to get those leaves the sunlight they need. Some plants need much direct sunlight, whereas others are more shade tolerant. Where sunlight is at a premium, such as in an understory, plants can develop very large leaves to capture as much light as possible. In terms of