They could look for similarities in the DNA or protein structuresof the organisms<span> and similarities in early development</span>
The answer should be 2. Skin fossilization is rare due to decomposition and scavengers.
A single molecule is the one that is responsible for initiating a signal transduction pathway. The answer in this question is a single molecule. Molecule is defined as an electrically neutral group of two atoms or more held together by a chemical bonds.
It might have mold On The surface
