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kingdom of multicellular eukaryotic organisms that do not have cell walls, feed heterotrophically and are motile. All higher animals reproduce sexually.
the tough connective tissue membrane surrounding bones on the outside. It contains nerves and...
list of questions or statements that are used to classify or identify a living organism.
a duct through which saliva passes from the salivary gland into the mouth.
organelles in which cellular respiration takes place to produce ATP to supply cells with energy...