Question

who observed the cells in tree

Answer 1

Robert Hooke discovered first cell in 1665, but it was dead cell in bark (cork cell) from a tree. Antonie Van Leeuwenhoek discovered first living cell in 1674, in pond water which was a protozoa. Both of the scientists used their own microscope.

Answer 2

Robert Hooke discovered first cell in 1665, but it was dead cell in bark (cork cell) from a tree.