The barnacle is an organism that filters food from the water as it passes by. The barnacle is not able to move on its own, so it needs a hard, flat surface to attach itself to. Barnacles are often found harmlessly attached to the backs of whales. What relationship is most similar to the relationship between a barnacle and a whale?
A bird eats the leeches that it removes from the mouth of a crocodile.
Bees land on flowering plants, gathering nectar and pollinating flowers.
A cow walks and insects fly into the air where the cattle egrets eat them.
Mistletoe grows on a maple tree, absorbing the tree’s water and nutrients.
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The relationship between a barnacle and a whale is most similar to the relationship between bees and flowering plants. Just like barnacles attach themselves to whales to filter food from the water that passes by, bees land on flowering plants to gather nectar and pollen for food. In both cases, one organism benefits from the other without causing harm.
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