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?

Does the weight loss program have practical significance? a. no, the program is not practically significant because the results are likely to occur even if the weight loss program has no effect. b. yes, the program is practically significant because the results are too unlikely to occur by chance. c. yes, the program is practically significant because the amount of lost weight is large enough to be considered practically significant. d. no, the program is not practically significant because the amount of weight lost is trivial.