Yes, it's possible, although it can impair reasoning somewhat.
Humans themselves do not use photosynthesis, but because humans depend on plants, as well as other animals that eat plants, in order to live, no, humans could not live without photosynthesis. Unless plants had another way to make food for themselves, humans could not live without photosynthesis.
Shows that over time organs that are not needed or not used that a species can live without begin to appear in offspring. ex) some humans are born without their wisdom teeth
of course they can they have been doing that for hundreds of millions of years in remote areas of the earth
p.s.
jes :)
yes. no.
# # #
Yes humans can live with out heads if they are an zombie.
grass we can always live without grass
Yes.
No.
No, humans cannot live without establishing a harmonious connection with the ecosystems in the oceans.
yes they can. they actually used to live without humans in herds, until they were domesticated by humans and used for traveling purposes. there are still about 25,000 wild herds of horses.
Yes.
no our brain will dry out
Nope.
Which hemisphere is south from were you live in?