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The four interacting parts of eukaryotic cells.
Rafflesia arnoldii, the world's biggest flower, lives as a parasite in Indonesian rain forests.
Several species of squirrels have melanistic phases. In large parts of United States and Canada, the
Hiatal hernia. (a) The hernia occurs when the stomach protrudes through the diaphragm and into the t
Parts of a typical spark plug.
Immune-to-brain signaling occurs in response to infection, injury, and inflammation that occur in pe