Please help asap!!!
As you observe an unknown cell under a microscope, you make the following observations.
There is one large, irregular structure that occupies about half the cell.
The cell has several small, green, circular objects inside it.
It has a medium-sized circular structure that appears to be a nucleus.
There is a thick, rigid structure that surrounds the cell.
What type of cell are you observing?
A: an animal cell
B: a bacterium
C: a protist
D: a plant cell