The most specialized organism is the GRIZZLY BEAR. Specialized animals refers to those animals, which have different types of cells in their body which carry out different types of functions.
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Spores are used by groups of ancient plants and fungi in one stage of their reproduction. ... Spores grow into intermediate plants called gametophytes. Neither of these groups of plants produces flowers. Pollen is used by flowering plants to fertilize seeds.
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The mechanism that Darwin proposed for evolution is natural selection. Because resources are limited in nature, organisms with heritable traits that favor survival and reproduction will tend to leave more offspring than their peers, causing the traits to increase in frequency over generations.
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