Tyler is conducting an experiment in order to determine the effect that fertilizer A and fertilizer B have on grass. He conducts multiple trials and concludes that the grass grows better using fertilizer A. How could Tyler make sure his results were trustworthy?

A. Another scientist could reproduce the same experiment.

B. Another scientist could offer suggestions to make the experiment better.

C. Tyler could add a third fertilizer to his experiment.

D. Tyler could change the amount of water the grass received

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!