Ques: Q: What rod provides stiffness to counterbalance the pull of muscles? Read this paragraph and choose the correct option from the provided answers: The notochord lies between the dorsal nerve cord and the digestive tract. It provides stiffness to counterbalance the pull of muscles. Choices: - vertebrae - spinal cord - mesoderm - notochord A:
Ans: notochord

Ques: Q: Coal is a solid hydrocarbon formed from what type of decaying material? Read this paragraph and choose the correct option from the provided answers: Coal is a solid hydrocarbon formed from decaying plant material over millions of years. Choices: - insects - mammals - soil - plant A:
Ans: plant

Ques: Q: Portable amplifiers have batteries that store what type of energy? Read this paragraph and choose the correct option from the provided answers: Amplifier: Tim Walker; Battery: Emilian Robert Vicol. Portable amplifiers have batteries that store chemical energy . Amplifier: CC BY 2.0; Battery: Public Domain. Choices: - kinetic energy - mechanical energy - carbon energy - chemical energy A:
Ans: chemical energy

Ques: Q: What equals the output power divided by the input power? Read this paragraph and choose the correct option from the provided answers: ; The efficiency equals the output power divided by the input power. Choices: - output - potential - inertia - efficiency A:
Ans:
efficiency