You are presented with the question "what relies on a relatively narrow range of acidity?" and the following answer choices: - organisms - carbon - animals - hydrogen - density - trees - Most plants - barnacles Now knowing that all life relies on a relatively narrow range of pH, or acidity and all organisms have life cycles, choose the best answer.
organisms

You are presented with the question "What are plants and animals?" and the following answer choices: - absorb light energy - bacteria - important habitats - produce light - prokaryotes - multicellular - insects - air Now knowing that animals are a kingdom of multicellular eukaryotes and all plants are eukaryotes, choose the best answer.
multicellular

You are presented with the question "What can reduce respiratory system capacity?" and the following answer choices: - Breathing - Smoking - influenza - bacteria - Pollution - Exercising - Pesticides - Singing Now knowing that smoking causes direct damage to the lungs and when lung damage is experienced, frequently the total capacity of the respiratory system is reduced, choose the best answer.
Smoking