What are you procrastinating on right at this moment ?

Repeatedly putting off a homework assignment until the night before it's due.

See below:

Explanation:

I'm not sure if this a fill-in kind of question, or if you are genuinly asking, but I'll answer something generic in case it is for homework and you need a paragraph.

At the moment, I am procrastinating on taking care of myself. I find that I am always either busy with schoolwork or (insert sport/hobby here), or I am going out of my way to make others happy. I think that I should take some time for myself to work on the things I need to do. I procrastinate on things like reading (insert book name), starting (insert hobby or buisness), and (insert long-awaited chore, like cleaning out closet.)

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!