17. Plants begin forming a in the midline of the cell during 18. The nuclear membrane reappears and the chromosome unwind back into chromatin during

19. During the cells are physically separated into two genetically identical daughter cells

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measuring light intensity

light meters can be used to measure light intensity. the meter is held at the soil surface and pointed in the direction of the maximum light intensity, and then the meter is read.

errors can be made when measuring light intensity by accidentally shading the light meter. the reliability of the results can be checked by taking many samples.