Q: Both endotherms and ectotherms control what through behavioral responses to changes in the environment? Choices: - sleep cycles - hormones - gas temperature - body temperature A:
body temperature

Q: Atoms with the same atomic number but different mass numbers are called what? Choices: - tropes - organisms - reactions - isotopes A:
isotopes

Q: Q: Are scissors simple or compound machines? Choices: - lever - neither - simple - compound A:
A: compound

Question: Q: What is added to alcohol and used as an antiseptic? Choices: - chloride - arsenic - chlorine - iodine A:
Answer: iodine

*Question*
Q: What trophic level are secondary consumers (which eat primary consumers) considered to be? Choices: - trophic level 5 - trophic level 4 - trophic level 2 - trophic level 3 A:
**Answer**
trophic level 3

Q: Food is broken into smaller particles by mastication, a process involving action by what structures? Choices: - cilia - proteins - tonsils - teeth A:
teeth