To raise an arm upward, the muscle on one side of it contracts. What happens to the muscle on the opposite side of the arm? contracts relaxes both contracts and relaxes neither contracts nor relaxes

Why do carbohydrate molecules function so well as fuel for the body?

Which ideas did your answer contain? check all that apply. no food for organisms no oxygen in the atmosphere no trees or flowering plants no products based on trees or plants (building materials, medicines, fuels, fibers) no fossil fuels

What organs comprise the respiratory system of a bird