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animals with two cellular body wall layers: the ectoderm and endoderm.
two species that interact symbiotically in a relationship that is beneficial to both species....
coiled thread-like structures of DNA and histone, which is a protein, in the cell nucleus. They...
outgrowths of neurons (nerve cells) that transmit nerve impulses towards the cell body.
wild animals from tropical forests that are captured or killed for food or traditional medicine...