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animals with three cellular body wall layers: the ectoderm, mesoderm and endoderm.
group of similar organisms that can breed with each other to produce fertile offspring. It is...
structure that contains the two centrioles arranged at right angles to each other in animal...
an aerobic respiration in animal cells resulting in the formation of lactic acid.
simple connective tissue with a network of white, inelastic, collagen fibres and small, yellow,...