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Which of these animals has only two germ layers, outer… | StemPy Lab

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Which of these animals has only two germ layers, outer and inner?

BiologyMediumHigh School (11–12)Diversity of Living Organisms › Basis of Animal Classification A-Level Board Exam IB

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Which of these animals has only two germ layers, outer and inner?

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← Any cut through the central axis of an animal gives two matching halves. Which animal shows this?Tube feet, worked by a system of water canals, help an animal move and catch food. To which phylum does it belong? →

More onDiversity of Living Organisms › Basis of Animal Classification

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