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A typical eukaryotic cell is comprised of cytoplasm with different organelles, such as nucleus, endoplasmic reticulum, G..

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Adaptation, in biology and ecology, refers to the process or trait through which organisms or the populations in a habit..

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This tutorial elaborates on the physical development of humans, particularly from puberty to adulthood. Read this tutori..

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Meet the colorful takahē, an extremely rare flightless bird. Find out more about its unique features and why they matte..

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This tutorial elaborates on how the nervous system works, particularly at the tissue level of the brain. There are three..

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Hormones are produced in the endocrine glands of animals. The pituitary gland and hypothalamus are the most impor..