Animals must obtain energy from sources outside their own body. which of these substances is a source of chemical potential energy that animal cells can use?
a. soil
b. air
c. iron
d. sugar

Prior to the mt. st. helens eruption on may 18, 1980, satellite and topographic views of the volcano were captured. based on the topographic map of mt. st. helens, what is the contour interval if the volcano height is 2,950 m? question 9 options: 600 m 400 m 750 m 500 m

What processes would you expect to be key in the production of yogurt ?

Which process in respiration happens first? a)pyruvate processing b)electron transport chain c)krebs cycle d)glycolysis