Now listen to part of a lecture on this topic in a biology class.
So, here's a good example of this. Mites are very small, insect-like creatures. Mites live in tropical climates and feed on nectar and pollen and flowers, but these tropical flowers don't last long. They wilt and fall off quickly and so the mites need to find new flowers in order to get more nectar and pollen to eat, but the mites can't fly and they are so small that it would take them awhile and a lot of effort to climb down one flower, crawl to another one, and climb all the way up again. So, how do they get to the next flower? Well, there's a bird: the hummingbird. Hummingbirds eat the nectar from the same flowers as the mites, so when a hummingbird comes around and sticks its beak into the flowers to get the nectar out, the mites quickly climb onto the hummingbird. Well, as I mentioned, mites are pretty tiny, so the hummingbird isn't harmed in any way and all they do is stick to the hummingbird. Since the hummingbird also goes from flower to flower for nectar, it takes the mites along. Once the hummingbird gets to the next flower, the mites climb off and eat some pollen and nectar there on the new flower. Without the hummingbird carrying them from one flower to another, the mites would find it much more difficult getting food.
Explain how the example of the mite and hummingbird in the lecture, illustrates the concept of phoresy.
名师1对1，深度分析薄弱项，高效提分
This passage talks about a concept named phoresy. Phoresy refers to a temporary relationship in which one animal which is unable to move from one place to another depends on another animal to transport itself in order to get enough resources without causing any injury. In the lecture, the man takes mites as an example. He mentions that mites feed themselves on the nectar and pollen of certain kind of flower. However, they are too small to move from one flower to another. Luckily, there is also a kind of bird which also eat the same kind of flower. So the mite just need to stick to the bird and the bird can take it to a new flower. Also mites are tiny enough so they won’t cause any injury to the birds.
