*Question*
If bacteria can have a negative impact on an organism, then what can have a negative impact on an organism?  Answer choices: - viruses  - leukemia  - Pollution  - chickenpox  - money  - rest  - health  - bacteria
**Answer**
bacteria

*Question*
If vessels carry deoxygenated blood, then what carries deoxygenated blood?  Answer choices: - cows  - mammals  - elephants  - goats  - vessels  - crocodiles  - ferns  - chickens
**Answer**
vessels

*Question*
If earth orbiting the Sun causes days to change, then what causes days to change?  Answer choices: - Space travel  - recovery time from fatigue  - Earth orbiting the Sun  - sunlight  - earthquakes  - Solar energy  - prolonged thirst  - global warming
**Answer**
Earth orbiting the Sun

*Question*
If nectar is used for attracting birds to flowering plants, then what is used to attract birds to flowering plants?  Answer choices: - cellulose  - Collagen  - chemicals  - energy  - seeds  - a chime  - nectar  - hormones
**Answer**

nectar