If you're talking about the ones in space then I would say communication.
If you send a text or make a call or send an email it goes to the satellites first and them goes to whomever you sent it to:)
I hope I helped:)
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He was responsible for the formation of the last part of the cell theory which stated that "cells arise from pre-existing cells ". Rudolf Virchows laid the foundation of cellular pathology which <u>explained more clearer how diseases occurred at cellular level.</u>Through his work, <u>scientists are now able to diagonose diseases more accurate.</u>
D - the endoplasmic reticulum (ER)
<span>Size and complexity are limited in systems usually by a combination of factors. Such as access to resources. Successful reproduction. Evolution over time dictates what is a successful balance in size and complexity in a system in its environment. If the resources are there and there is successful adaptation to the environment, systems can be supported that are extremely complex and also huge in size. Say the human body as a system.</span>