Inside a living cell which type of bond would be the most stable

Covalent bond.

Explanation:

Chemical bond may be defined as the bond present the elements. The different types of chemical bond are covalent bond, ionic bond, vanderwall's interaction and hydrophobic interaction.

The living cells also constitute the chemical bond in their structure. The most stable chemical bond in the living cell is covalent bond. Covalent bond has highest bond enthalpy and hence the most stable chemical bond in the living molecules. Various proteins and other molecule linked together through covalent bond.

Thus, the correct answer is covalent bond.

before, trains worked using the steam engine. thus, it uses heat so it is crucial to apply heat balance. the steam engine absorbs energy during the stage of boiling water. so, this is the endothermic reaction. when the steam is used to work the piston, it has to release this energy through running the train. the excess energy is released as an exhaust to the chimney. this is the exothermic process because it releases energy to the surroundings.

density and pressure