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The two groups are: animals with a backbone these are called vertebrates animals without a backbone – these are called invertebrates. Vertebrates all have backbones.
Puberty. <span>While puberty involves a series of biological or physical transformations, the process can also have an effect on the psychosocial and emotional development of the adolescent. </span>
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Toxicology is a scientific discipline, overlapping with biology, chemistry, pharmacology, and medicine, that involves the study of the adverse effects of chemical substances on living organisms and the practice of diagnosing and treating exposures to toxins and toxicants.
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Answer: HELLOOOOO!!!!!!!!!!!!!!!
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