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In evolutionary developmental biology, heterochrony is any genetically controlled difference in the timing or duration of a developmental process in an organism compared to its ancestors or other organisms. The term biology comes from two greek words bios means life and logos means knowledge. Accordingly biology has been divided into two branches. Pdf neoteny and progenesis as two heterochronic processes. Cragg 5 general evolutionaryregularities of organic and social life73 valeriai. Popular general biology books goodreads share book. Free evolutionary biology books download ebooks online. You will be glad to know that right now cell biology book by elsevier pdf is available on our online library.
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