Identical twins in humans, which are deuterostomes, are formed when cells at the four-cell stage are separated. a grasshopper, which is a protostome, will die if the cells are separated at the four-cell stage. what does this indicate about when the cells are differentiated in the zygote? why might deuterostomes differentiate their embryonic cells later than the protostomes?
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Identical twins in humans, which are deuterostomes, are formed when cells at the four-cell stage are...
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