If tobacco is harmful to lungs, then what does tobacco harm? Answer choices: - lungs - plants - cancer - cells - tissue - blood - kidney - people
lungs

If reptiles have a complete digestive system and a closed circulatory system, then what have a complete digestive system and a closed circulatory system? Answer choices: - viruses - reptiles - phytoplankton - mammals - bacteria - graptolites - humans - elephants
reptiles

Q: If using a gasoline engine requires igniting gasoline, then if you want to use a gasoline engine, what must you do with the gasoline? Answer choices: - drain the gasoline - wash the gasoline - cool down the gasoline - move to different locations - adding heat - ignite the gasoline - vaporization - evaporation
A: ignite the gasoline

Question: If bacteria can cause food to spoil, then what causes food to spoil? Answer choices: - influenza - Dehydration - Pesticides - disease - viruses - Bacteria - toxins - sea squirts
Answer: Bacteria

*Question*
If harming a certain kind of organism causes that animal's population to decrease, then harming a certain kind of animal will cause the population of that animal to do what? Answer choices: - decrease - eat more - increase - break off - threatened - reproduce - reduce - kill them
**Answer**
decrease

*Question*
If sweating reduces heat necessary for maximum predatory activity, then what reduces heat necessary for maximum predatory activity? Answer choices: - Evaporation - energy usage - warming - sweating - fur and fat - eating - tail fins - drinking
**Answer**
sweating