Which of the following are considered requirements for the emergence of life? choose one or more:
a. continual source of energy
b. molecular oxygen (o2)
c. liquid water
d. essential elements for organic molecules
e. dna

All exept E

Explanation:

The requirements for the emergence of life are:

A constant energy source such us, radiation, lightning, solar light, and heat to induce the formation of biomolecules.A supply of life constituting major elements or essential elements for organic molecules such as carbon (C), hydrogen (H), nitrogen (N), Oxygen (O), phosphorus (P), iron (FE) among others. A non-toxic environment with the presence of liquid sodium-free water.Dry- wet cycles to cell membranes and polymerize RNA. Appropriate chemical non-toxic conditions in the atmosphere including reduced gases such as HCN, NH3, and CH4.

The truman doctrine was an american foreign policy whose stated purpose was to counter soviet geopolitical expansion during the cold war. it was announced to congress by president harry s. truman on march 12, 1947, and further developed on july 12, 1948, when he pledged to contain threats to greece and turkey