A certain Aphid can make their own essential nutrients called carotenoids, according to University of Arizona researchers. It is widely known that animals do not make their own carotenoids. Carotenoids are building blocks that are crucial in life for vision, bone growth and other key functions. Animals must seek out these nutrients in order to sustain life. But not the Pea Aphid, they have a way to make it own there own. Well they don't do it by themselves. These aphids have a symbiotic relationship with a bacteria that produces the nutrient. These bacteria are passed from the mother to the babies. If the bacteria dies the aphids die.
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