Q: What is critical for the formation of hemoglobin? Choices: - salts - proteins - platelets - iron ions A:
iron ions

(Question)
Q: What controls the opening to the airway and gut? Choices: - tongue - teeth - electrons - mandible A:
(Answer)
mandible

Ques: Q: What is considered the center of the solar system? Choices: - nebulla - earth - heat - sun A:
Ans: sun

(Q).
Q: What is approximately the average stroke volume in humans? Choices: - 80 ml - 65 ml - 75 ml - 70 ml A:
(A).
70 ml

Ques:Q: The nature of what gives metals the properties of being ductile and malleable? Choices: - liquid bonds - magneticism - titanium bonds - metallic bonds A:

Ans:metallic bonds

Q: What type electrical circuits have multiple paths the current may take? Choices: - perpendicular - single loop - serial - parallel A:
parallel