IV.Gymnosperm

The gymnosperms are heterosporous; they produce haploid microspores and megaspores

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Evolution

Evolution means descent with modification, or change in the form, physiology, and behavior of organisms over many generations of time. 

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Proximate causes - The subject of cell biology, neurobiology, and many other biological disciplines.

Ultimate causes - Their historical causes, especially the action of natural selection.

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Before Darwin - Christians interpreted “special creation”

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Carolus Linnaeus - Classified “related” species into genera, “related” genera into orders, and so on. 

To him, “relatedness” meant propinquity in the Creator’s design.