As células são as unidades funcionais e estruturais dos seres vivos. Apesar da variedade dos tipos celulares, algumas partes são encontradas em todas as células. Costuma-se dizer que essa estrutura é formada por membrana plasmática, citoplasma e núcleo, uma informação incorreta. Analise as alternativas a seguir e marque aquela que explica corretamente por que não podemos identificar essas três partes em todos os tipos celulares. *

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!

colors do exist. the color of the sky is actually violet; humans percieve the color of the sky as blue.

we need additional information in order to determine the cause of death for anna garcia. there are at least 3 things with explanation included as to why we need them are as follows: