Question

discovery of the cell
all living things are made of _.
in 1665, _ looked at a thin slice of cork, under a microscope.
he saw _
he called these chambers “_”.
he was the first to observe _.
another scientist, _, observed pond water under the microscope and saw _.
he was the first to _.
along with other scientists and observations, _
in 1838, _ concluded that all _.
in 1839, _ stated that all _.
in 1855, _ concluded that _.

Explanation:

All living things are made of cells. Robert Hooke in 1665 looked at cork under a microscope, saw box - like chambers and called them "cells". He was the first to observe plant cells. Antonie van Leeuwenhoek observed pond water and saw single - celled organisms, being the first to observe living cells. Matthias Schleiden in 1838 concluded that all plants are made of cells. Theodor Schwann in 1839 stated that all animals are made of cells. Rudolf Virchow in 1855 concluded that new cells come from pre - existing cells.

Answer:

All living things are made of cells.
In 1665, Robert Hooke looked at a thin slice of cork, under a microscope.
He saw box - like chambers.
He called these chambers "cells".
He was the first to observe plant cells.
Another scientist, Antonie van Leeuwenhoek, observed pond water under the microscope and saw single - celled organisms.
He was the first to observe living cells.
Along with other scientists and observations, cell theory was developed.
In 1838, Matthias Schleiden concluded that all plants are made of cells.
In 1839, Theodor Schwann stated that all animals are made of cells.
In 1855, Rudolf Virchow concluded that new cells come from pre - existing cells.