This image shows the waxy cuticle that covers the aerial surfaces of a plant. The cuticle is a vital adaption in plants and has played a part in their success on land. Charophyceans, one of the closest living ancestors of land plants, thrived in the water. Therefore, it did not need anything to prevent water loss, support against gravity or some means of spreading their gametes. But in order for plants to thrive on land, they needed to stand up against gravity, maintain moisture, and reproduce on land. The cuticle is an example of an adaptation to prevent water loss on land. Along with the cuticle is the stoma. Stomata are like little pores on the cuticle that allow gas exchange. They are typically open during the day to carry out photosynthesis, and are closed at night to prevent water loss. Land plants are so abundant now on the Earth because of these adaptations.