No. An owl is an animal.
yes
Source of mass and energy.
The sun is the initial (primary) energy source for life. Ingestion and digestion of a food source is an animal's primary source of energy.
Adenosine triphosphate(ATP)
There are many advantages to using animal waste as an energy source. The most obvious advantage being that it is freely available.
ATP
Any energy source that is obtained from animal or plant matter, excluding fossilised material, is considered biomass energy. So, anything that's not that, including oil, coal, gas, and nuclear energy.
gluecose
It's called death.
Fats and protiens
ATP fuels cell division in animal cells.