I would say d because mars for us maybe was with ice till the big bang and made mars really hot.
Answer:
C.
Explanation:
So, a pathogen is something that causes disease, like a virus like the rhinovirus, which causes the common cold.
A compound is a molecule made of atoms from different elements. All compounds are molecules, but not all molecules are compounds. Hydrogen gas (H2) is a molecule, but not a compound because it is made of only one element. ... Atoms that share electrons in a chemical bond have covalent bonds.
Answer:
The modern organisms would have more muscular bodies
Explanation: