This element is a gas, can only form one bond, and is found in compounds like carbohydrates. What is it? A. Oxygen B. Hydrogen C. Water D. Carbon

You find a fossil that you are sure shows evidence of bipedalism. you know this because which of the following anatomical traits is present? a. thighbones that angle in toward the knees b. a narrow pelvis c. opposable hallux d. posterior position of the foramen magnum