Q: What two gases are the main components of air? Choices: - oxygen and helium - carbon and oxygen - hydrogen and helium - nitrogen and oxygen A:
nitrogen and oxygen

(Question)
Q: What conveys signals received by the eye to the brain? Choices: - motor nerve - sciatic nerve - sensory nerve - optic nerve A:
(Answer)
optic nerve

Ques: Q: Which fuels provide most of the world's energy? Choices: - coal fuels - pattern fuels - artificial fuels - fossil fuels A:
Ans: fossil fuels

(Q).
Q: How many pathways do plants have for carbon fixation? Choices: - two - five - eleven - three A:
(A).
three

Ques:Q: What piece of technology can you use to see infrared light? Choices: - light meters - microscope - telescope - night goggles A:

Ans:night goggles

Ques:Q: The electrolysis of what substance produces hydrogen and oxygen gases Choices: - cholesterol - carbon dioxide - hydrocarbon - water A:

Ans:
water