An egg is protected by its outer shell. however, the shell also allows moisture and air to pass through. which cell structure performs a similar function? cell membrane cytoplasm nucleus vacuole

cell membrane

Explanation:

an egg is protected by its outer shell. however, the shell also allows moisture and air to pass through. which cell structure performs a similar function? cell membrane cytoplasm nucleus vacuole

Cell membrane provides rigidity to the cell.They protect the cell as a whole ust like how the egg cell is protected externa;ly by the shell.. The nucleus controls the activity of the cell

The vacuoles stores food. they store nutrint. they are shell like striucture in the cytoplasm.

The cytoplasm gives shape to the cell. they house all other organells of the cell.

So cell membrane is the answer

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!

d. groundwater flows through the subsoil and deposits minerals.