Because they are so small and had to wait for the invention of the microscope
They cannot be seen with the unaided eye (except for the "giant" cells of a few organisms like slime molds).
memory cells
Chemical evolution is thought to have caused the first cells to spontaneously generate over a very long period of time.
Chemical evolution is thought to have caused the first cells to spontaneously generate over a very long period of time.
Memory Cells
This is because the brain cells get sent to another part of the mind, and retrieving it will take a long time to do so.
actually, yes, in fact their on a land not yet discovered. There were even some a long time ago but have died of existence.
When they met Winnie, they had remained unchanged for 80 years.
When animal cells are in fresh water for a long time cytolosis occurs and red blood cells explode.
Lipids store energy for long periods of time in your cells.
He remained in power for a long period of time.
They divide, it takes some long time.
memory cells
You can wait. A long time
No, but they've remained very much the same for a very long time.
What time is the ten o'clock tour? How many undiscovered caves are there?
why not?
Chemical evolution is thought to have caused the first cells to spontaneously generate over a very long period of time.