Some common species of amoebas feed on decaying matter at the bottom of freshwater streams and stagnant ponds. The best-known of these, Amoeba proteus, is used for teaching and cell biology research. Parasitic species include Entamoeba coli, which resides harmlessly in human intestines, and Entamoeba histolytica, which is found in places where sanitation is poor and is carried by polluted water and sewage.
Not all the parts are sealed, however, which suggests the iPhone SE is not entirely resistant to water, as the Samsung Galaxy S7 is. Indeed, Apple hasn't officially said the iPhone SE, or the 6s/6s Plus, is resistant to water, whereas Samsung actively boasts water-resistance as one of the Galaxy S7's defining features.
Yes, most iPhone SE models are unlocked. The iPhone SE can also be purchased SIM-free. This means no carrier SIM card is included, the iPhone SE is unlocked, and a SIM card from any supported carrier can be used. One exception is Sprint or Sprint-supported carriers, which cannot be purchased using the SIM-free option.