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Plants, like animals, produce hormones to regulate plant activities, including growth. They need these hormones to respo..

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Human intelligence provided the means to utilize abstract ideas and implement reasoning. This tutorial takes a further l..

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Population Regulation in an Ecosystem

With regard to the population size of a species and what factors may affect them, two factors have been defined. They ar..

Digestion and Absorption of Food
Digestion and Absorption of Food

The gastrointestinal system breaks down particles of ingested food into molecular forms by enzymes through digestion and..

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The sequence of amino acids determines the type of protein. Protein is synthesized according to the sequence of nucleoti..