(Question)
Q: Rather than being dead, dry, and brittle, what support structures of the human body consist of living tissues and are supplied with blood and nerves?   Read this paragraph and choose the correct option from the provided answers:  Some people think bones are like chalk: dead, dry, and brittle. In reality, bones are very much alive. They consist of living tissues and are supplied with blood and nerves.   Choices:  - lungs  - feet  - hearts  - bones   A:
(Answer)
bones


(Question)
Q: Most of food's chemical energy ultimately comes from what source?   Read this paragraph and choose the correct option from the provided answers:  Living things must have chemical energy from food to power life processes. Most of the chemical energy in food comes ultimately from the energy in sunlight.   Choices:  - plants  - air  - minerals  - sunlight   A:
(Answer)
sunlight


(Question)
Q: What group of animals has permeable skin that makes them vulnerable to pollution?   Read this paragraph and choose the correct option from the provided answers:  Amphibians have permeable skin that easily absorbs substances from the environment. This may explain why they seem to be especially sensitive to pollution. Monitoring the health and survival of amphibians may help people detect pollution early, before other organisms are affected.   Choices:  - fish  - mammals  - reptiles  - amphibians   A:
(Answer)

amphibians