Two students conduct the same experiment, but they get different results. What should the students do next? A. The students should check their procedure and tools for sources of error. B. Both students should throw out their data and start over. C. The students should compare data with other students and then use the data from the student who was closest to the rest of the class. D. The students should find the average of each data set and each report the average data.

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The answer is: A

If two students do the same experiment, but get different results, they should not throw it away. It may be a phenomenon and they both got different results. They should not compare to the rest of the class either. Finding the average of the data would not help either. The answer is A

cells use diffusion to get substances in and out of themselves. that diffusion will occur across the cell membrane or the outer covering of the cell. because we are talking about the surface of the cell, surface area and volume are  important factors here. as a cell increases in size, its surface area and volume increase as well.  we call that the surface area to volume ratio (sa: vol).  but the catch is that  volume increases at a greater rate than surface  area. in other words, as a cell gets bigger, the sa: vol gets smaller. so a really small cell like bacteria is mostly cell membrane (surface) with very little contents (volume). a really big cell like an egg, is mostly insides with a super thin membrane. so what ends up happening is that the cell cannot efficiently diffuse all of the stuff it needs in/out to survive. therefore cell size is limited to about 100mm. so how do we make organisms bigger than 100mm? cells divide! by dividing and becoming multicellular, organisms are able to grow!   check out the diagrams i attached to see the effect of sa: vol. i hope this ! good luck!