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Which type of symmetry allows an organism to be divided into equal halves by any plane passing through the central axis?
Which type of symmetry allows an organism to be divided into equal halves by any plane passing through the central axis?
What type of animals have a body cavity that is absent?
What type of animals have a body cavity that is absent?
In which type of classification are cells arranged in two embryonic layers, external ectoderm, and internal endoderm?
In which type of classification are cells arranged in two embryonic layers, external ectoderm, and internal endoderm?
Which structure is formed during embryonic development and is a defining characteristic of chordates?
Which structure is formed during embryonic development and is a defining characteristic of chordates?
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In which type of symmetry can the organism be divided into equal halves only by one plane?
In which type of symmetry can the organism be divided into equal halves only by one plane?
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