Birds and mice compete for the same food. If the number of birds increases by a lot, there will be less seed for the mice to feed on. The mice will compete for the remaining seeds and fewer mice will survive this would lead to the number of mice decreasing.
ATP or Adenosine Triphosphate is
the energy that the cells use to make the body perform properly. Carbohydrate
is the preferred nutrient for ATP production in the mitochondria of the cell
because it can be easily broken down. When absorbed by the body, carbohydrates
automatically turn into glucose and glycogen.
<span>
Glucose, as the by-product of
carbohydrates, readily provides a supply of energy to the body as it circulates
with the blood. Too much glucose in the blood will make the blood sticky and
will have a hard time to flow in the blood vessels.
Glycogen on the other hand,
is the back-up energy source of the body when glucose is no longer available.
It is stored in the muscles and liver. It can readily turn again into glucose
when the body thinks it needs it.</span>
Although I don't know for sure what is an epicycle, I think your answer is right and I would try to explain as apliable to solar systems on the Milky Way known through astronomical discoveries, conside ring just one star called "Sun" and a few distant planets describing a certain type of movement around it. I should add that the Moon describes the same type of movement around the Earth ( which is not a star), being the only natural satelite of the planet Earth, being kept around it by the circumstances created by the proportion of forces occured while moving