Peptidoglycan is a unique macromolecule found in cell walls

Peptidoglycan is a unique macromolecule found in cell walls of what kind of organism archea yeast algae bacteria All of the above According to the fossil record, when did eukaryotes first appear on Earth? 1 million years ago

Solution

1) In bacteria ,cell wall is composed of peptidoglycan

2) Eukaryotes appear 2.1 million years ago