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Organisms employ different strategies to boost its defenses against antigens. Humans have an immune system to combat pat..

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Seed plants are vascular plants. They differ from the other vascular plants in producing seeds that germinate into a new..

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Plants in lentic habitats have features not found in terrestrial plants. They acquired these features as they adapt to t..

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