Question

all plants and animals are composed by a cell .The above dicovery was made by whom and when?what does it refers​

Answer 1

Answer:

Matthias Schleiden and Theodor Schwann in 1839

Explanation: it is the first tenet of the cell theory given by  Matthias Schleiden and Theodor Schwann in 1839.

Like buildings are made up of bricks , all plants and animals are made up of cells

Answer 2

The cell (from Latin cella, meaning "small room") is the basic structural, functional, and biological unit of all known living organisms. A cell is the smallest unit of life. Cells are often called the "building blocks of life". The study of cells is called cell biology or cellular biology.

Cells were discovered by Robert Hooke in 1665. He discovered in cork, then in living plant tissue using an early compound microscope. He coined the term cell.