Dan took three samples of water from the creek behind his house once a month for the last six months. he tested the water and reported the results in the following data table. water quality indicator test results dissolved oxygen dissolved oxygen levels in the last three months decreased rapidly. fecal coliform fecal coliform ranges from a low of 89 colonies per liter to 102 colonies per liter over the six-month period. nitrates nitrate levels ranged from 6 to 7 mg/l. phosphates phosphate levels were between 0.01 mg/l and 0.3 mg/l. ph the average ph was 6.9. turbidity the water was clear in the first few months, but it became increasingly cloudy over time. which water-quality indicators would be of concern in this situation? explain your response. be sure to discuss any implications these water-quality indicators could have on the environment and human health

explanation:

okay now i don't know this but for the pints nothing else to say bye

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!