You are presented with the quiz "what relies on a relatively narrow range of acidity?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "all life relies on a relatively narrow range of pH, or acidity" and "all organisms have life cycles". So, what's the best answer to the question?
OPTIONS:
- organisms
- carbon
- animals
- hydrogen
- density
- trees
- Most plants
- barnacles

Answer: organisms

You are presented with the quiz "What are plants and animals?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "animals are a kingdom of multicellular eukaryotes" and "all plants are eukaryotes". So, what's the best answer to the question?
OPTIONS:
- absorb light energy
- bacteria
- important habitats
- produce light
- prokaryotes
- multicellular
- insects
- air

Answer: multicellular

You are presented with the quiz "What can reduce respiratory system capacity?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "smoking causes direct damage to the lungs" and "when lung damage is experienced, frequently the total capacity of the respiratory system is reduced". So, what's the best answer to the question?
OPTIONS:
- Breathing
- Smoking
- influenza
- bacteria
- Pollution
- Exercising
- Pesticides
- Singing

Answer:
Smoking