Now listen to part of a lecture from a biology class.
(male professor) OK, so a good example of this type of plant, common to the rainforest, is the Urn plant. The Urn plant wraps its roots around the branches of the trees or sometimes around the trunk near the upper part of the tree. They use the tree for support and this allows them to reside high in the trees, in the canopy, where they can get plenty of sunlight.Now, the Urn plant has a unique shape. It got its name because of the formation of its leaves creates a kind of urn or bowl where it can store water. The Urn plant has rather long stiff spiky leaves. The leaves are slightly overlapping and are tightly rolled into a kind of cone shape or a funnel shape. Its flowers are held on a single stem in the center. Anyway, as I mentioned, the arrangement of the leaves forms a kind of receptacle or bowl at the base so that it is rainwater collects on the leaves it rolls down into the bowl where it can be stored.OK, so is unique shape helps it gather and store water. It also helps to gather other nutrients. This is because insects, dead leaves from other plants or other debris land on the leaves and then get washed down into the stored water. Gradually they decompose. The chemical break-down creates a nitrogen-rich food source in the stored water. So, the water supply contains a kind of liquid fertilizer that can be released to the plant whenever it needs the food.
Using the example of the Urn plant, explain how epiphytes have adapted to life in the rain forest.
名师1对1，深度分析薄弱项，高效提分
Epiphytes is a kind of rain forest plant that uses a host plant as a platform for growth to get sunlight. And it also develops some mechanism to get nutrients since it's away from the soil. For example, Urn plant often wraps its root around the tree or the trunk of upper part of the tree so it resides high in the canopy to get plenty of sunlight. Then it has leaves of unique shape which help it get nutrients. Its leaves are long, stiff and spiky. They're slightly overlapping and rolled tightly to form a funnel/cone shape, and then its flowers are held on a single stem in the center. So the whole thing is shaped into a bowl. And when it rains, the rain water rolls down to be collected in the bowl. Then the debris of dead leaves and insects falls into the bowl and decomposes there to form a kind of fertilizer, which can be used by the plant when in need. (166 words)
