The shark also gets benefits from this relationship. The pilot fish cleans food scraps and insects from the shark’s hide.
Another example of depending on each other is the sea anemone and striped clown fish. The sea anemone looks like a flower and has petals that contain poisonous stinging cells. When small fish swim into the petals,the anemone traps and paralyzes (使麻痹) them. However,the striped clown fish is able to swim into the poisonous petals without being harmed. When he is in danger,he quickly swims into the sea anemone and is unable to be seen by his enemies. To pay for his safety,the clown fish brings food to the
the ox,antelope,rhinoceroses and African buffalo form such a relationship with the redbilled oxpecker. They provide daily meals for the bird. In fact the bird eats insects. The various large mammals act as a restaurant with a varied menu for the oxpecker. What do they get in return from the bird? Free beauty treatments!
Some plants live together in a beneficial relationship of symbiosis. The fungus (真菌类植物) does not have chlorophyll (叶绿素) that plants need to make food. However,green algae does contain chlorophyll. It is,therefore,able to feed the fungus along with itself. But nothing is free! The fungus repays it by protecting the algae. Since it takes in and stores water,it can provide the algae with a nonending water supply. 解题导语 本文用四个例子来说明一needs the help of the shark to lead his way.
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