If a person consumed large quantities of deep yellow/orange or dark green foods that are dietary sources of carotenoids, the foods produce harmful effects in the body because the rate of conversion to the animal form, retinal, is

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Although i don't know what is the simulated system, starfish are predators that eat mostly  microalgae,  snails, sponges, bivalves, mussels and other small marine animals. removing starfish from any system would definitely increase this animals that they prey.