Q: Connected to agriculture, forestry, mining, and urbanization, what is the single biggest cause of extinction today? Choices: - freshwater loss - hunting - global warming - habitat loss A:
habitat loss

Q: In angiosperms, flowers and fruits are adaptations essential for what process? Choices: - variation - death - photosynthesis - reproduction A:
reproduction

Q: Q: What molecule is made of two hydrogen atoms and one oxygen atom? Choices: - Oxygen - carbohydrate - lipids - water A:
A: water

Question: Q: Fermat's principle states that what will always take the path that takes the least amount of time? Choices: - sound - wind - electricity - light A:
Answer: light

*Question*
Q: What consists of all the living things and nonliving things interacting in the same area? Choices: - biodiversity - habitat - biome - ecosystem A:
**Answer**
ecosystem

Q: Which state of matter lacks a fixed volume, fixed shape, and consists of charged particles? Choices: - electrons - atoms - isotopes - ions A:
ions