Answer:
Organ is a unit/group of tissues (structurally) that performs a basic function while organ system is a group of various organs that together helps in certain biological processes (must for one's survival).
Water temperature<span> is one of the most important characteristics of an aquatic system, </span>affecting<span>: Dissolved </span>oxygen<span> levels. The </span>solubility of oxygen<span> decreases as </span>water temperature<span> increases.
hope this helps :3
</span>
Where molecules pass through a semipermable membrane from a less concentrated area into a more concentrated one.
"allowing for the emergence of old data in useful, new patterns"
Chromatin is the dna packaged around the proteins.
