What is the main source of energy for a pond community?

Amino acids contain the elements carbon, hydrogen, oxygen, nitrogen, and sometimes sulfur. of the 20 amino acids found in humans, 11 are called "nonessential" because they can be manufactured by the body when needed. which elements in these 11 amino acids are commonly obtained from the metabolism of sugar molecules?

Which statement is a physical property? becomes moldy quicklyeasy to digestconducts electricity poorlydoes not burn

What class of levers is shown in this image?