Q: Q: What are angiosperms most important function to humans? A:

OPTIONS:
- oxygen production
- gasoline
- water filtration
- food

A: food

Q: Q: Gravitropism ensures that roots grow into the soil and that shoots grow toward what? A:

OPTIONS:
- the north pole
- trees
- the south pole
- sunlight

A: sunlight

Q: Q: Which electromagnetic radiation is used to kill cancer cells? A:

OPTIONS:
- ultraviolet rays
- X-rays
- plasma rays
- gamma rays

A: gamma rays

Q: Q: Aldehydes, ketones, carboxylic acids, esters, and ethers all have functional groups containing what element? A:

OPTIONS:
- silicon
- methane
- carbon
- oxygen

A:
oxygen