Several studies of adolescents<span>, including one </span>with more<span> than 3,000 high school students, found that inadequate </span>sleep<span> is associated </span>with<span> higher levels of depressed mood, anxiety, behavior </span>problems,<span>alcohol use, and attempted suicide. </span>
Answer: A closed circulatory system and an excretory system consisting of tubular nephridia
Explanation:
Deletion because it worse then a substitution since your deleting something
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