Question

Convert the diameter from mm to micrometre (µm). Suppose the diameter of the visible field is 5 mm, meaning 5 × 1000 = 5000 µm.

Robert Hooke, in 1665, looked at a thin slice of a plant material through his microscope and saw tiny box-like compartments, which he called 'cells'. Which material did he observe?

Assertion (A): The compartments seen by Robert Hooke in cork were living cells full of cytoplasm. Reason (R): Cork is made of dead cells, so Hooke saw only empty boxes surrounded by walls.