Having a single cell (and thus not divided into cells)
1Like the bacteria, the archaea were single-celled organisms with relatively simple cells.
2Fossils of possible older single-celled green plants are still a matter of debate.
3In theory they go all the way back to the first single-celled organisms.
4But remember, these things are much, much simpler than single-celled organisms.
5If God did not create everything, how did the first single-celled organism originate?
6Amoebas and similar single-celled organisms were treated as proto-animals and algae as proto-plants.
7Even single-celled animals like bacteria and fungi breathe oxygen and give off heat.
8Under artificial pressure to become larger, single-celled yeast became multicellular creatures.
9Malaria is caused by a single-celled parasite that infects the blood.
10The same ray passing through a single-celled sperm or egg would destroy it.
11To fully digest wood, they must rely on even smaller single-celled microbes called endosymbionts.
12You want to start all over as a single-celled zygote?
13The same basic dynamics should apply to single-celled organisms, too.
14Fortunately for your eyeballs, it only works on single-celled organisms.
15Most living creatures that thrive in extremely hot environments are single-celled bacteria or archaea.
16Weightlessness alone could not have turned a single-celled organism into this startling green mass.