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Plants, like animals, produce hormones to regulate plant activities, including growth. They need these hormones to respo..
Earth was created around 4.5 billion years ago and life began not long after. Primitive life likely possessed the elemen..
It only takes one biological cell to create an organism. A single cell is able to keep itself functional through its 'mi..
Hormones are produced in the endocrine glands of animals. The pituitary gland and hypothalamus are the most impor..
Mammals are a diverse group of organisms, where most of them develop their offspring within the uterus of the mother. Ov..