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Health, 21.11.2019 00:31 gaby06

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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