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This tutorial deals with the structure and function of flowers, fruits, and seeds. Also included here are the types of f..

primitive arthropods
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The arthropods were assumed to be the first taxon of species to possess jointed limbs and exoskeleton, exhibit more adva..

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Early Mammals on Earth

The Earth's ecosphere was rapidly changing and throwing up a wide range of ecological niches that new adaptive organisms..

Gene Pool and Speciation
The Gene Pool and Population Genetics

According to Charles Darwin's theory of natural selection, preferable genes are favored by nature in the gene pool, and ..

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Osmoregulation is the regulation of water concentrations in the bloodstream, effectively controlling the amount of water..

Water Cycle
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The water cycle (also referred to as the hydrological cycle) is a system of continuous transfer of water from the air, s..