If exposure to air pollution can harm the lungs, then which type of pollution is most harmful to lungs? Answer choices: - Lead - air - Cars - oil - acid - CFCs - SO2 - mold
air

(Question)
If cars harm the respiratory and circulatory systems, then what harms the respiratory and circulatory systems? Answer choices: - oil - rain - sulfur - cars - tires - coal - tar - bicycles
(Answer)
cars

Ques: If coral polyps form reefs, then what do coral polyps form? Answer choices: - lagoon - graptolites - a cuticle - barnacles - bioaerosols - cave - coral reef - salt and water.
Ans: coral reef

(Q).
If agreenhouse is used to protect orchids from the cold, then what uses a greenhouse to be protected from the cold? Answer choices: - orchids - Roundworms - freezing - clouds - animals - organisms - our planet - monkeys
(A).
orchids

Ques:If living things use reproduction to have children, then how do living things have children? Answer choices: - death - people - humans - babies - it needs them - reproduction - mitosis - production

Ans:reproduction

If macroevolution occurs over geologic time at the level of genus or above, then what is considered to be part of macroevolution? Answer choices: - Man - genus - pollen - Birds - legumes - power - embryos - animals
genus