(a) In which part of the plant Robert Hooke discovered a Cell, and how did these cells appear?
(b) Organisms which can be seen only with the help of a microscope are called as?
(a) Robert Hooke in 1665 observed slices of cork under a simple magnifying device. These boxes appeared like a honeycomb.
(b) Organisms which can be seen only with the help of a microscope are called Microorganisms.