Which of the statements is not true regarding protists? Some are unicellular. They may have cell walls. They are usually aerobic, though some are not. They may be photosynthetic. They may be prokaryotic.

They may be prokaryotic is false.

Explanation:

Protists are eukaryotic organisms i.e they have membrane bound organelles and Nucleus. They are neither plants,animals or fungus. Protists have many form of nutrition and they may be aerobic or anaerobic.

Some protists photosynthesized like algae while others are heterotrophs

They may be unicellular or multicellular.

Some protists have cell walls while others don't.

endo:

regulates body hormones, aldosterone, vasopressin

neural:

signal, regulates body using electric signals, reflex

endo has to do with hormones; aldosterone and vasopressin are both hormones. i also had this question and got it right : d