True or False: The chemical energy stored in an organism’s fat can be used to produce new atoms that increase the organism's mass.

The statement is false because the chemical energy stored in an organism's fat cannot directly produce new atoms to increase the organism's mass. Instead, the energy from fats is primarily used in metabolic processes to generate ATP, which is the main energy currency of cells. This energy is utilized for activities such as muscle contraction, cellular repair, and maintaining bodily functions, rather than for creating new atoms.

Organisms do indeed take in nutrients, including carbohydrates, proteins, and fats, which are broken down and utilized for energy or to build cellular structures. However, the elements and atoms that make up the body's mass are obtained from the food consumed and are not created from the energy stored in fat. The process by which organisms convert calories from food into usable energy involves metabolic pathways, but it does not include the synthesis of new atoms from energy sources like fat.

Thus, the understanding of how energy storage and growth work in biological systems clarifies why the assertion regarding fat contributing to new atoms and mass increase is incorrect.