If organisms rely on a relatively narrow range of acidity, then what relies on a relatively narrow range of acidity? Answer choices: - organisms - carbon - animals - hydrogen - density - trees - Most plants - barnacles
organisms

If plants and animals are multicellular, then what are plants and animals? Answer choices: - absorb light energy - bacteria - important habitats - produce light - prokaryotes - multicellular - insects - air
multicellular

If smoking can reduce respiratory system capacity, then what can reduce respiratory system capacity? Answer choices: - Breathing - Smoking - influenza - bacteria - Pollution - Exercising - Pesticides - Singing
Smoking