Ques: Q: Structural adaptations in flying animals often contribute to reduced what? Choices: - blood flow - eyesight - respiration - body mass A:
Ans: body mass

Ques: Q: What is the gas that gives rotten eggs and sewage their distinctive smell? Choices: - calcium sulfide - methane - hydrogen peroxide - hydrogen sulfide A:
Ans: hydrogen sulfide

Ques: Q: What should a pregnant woman avoid while pregnant? Choices: - healthy food - vitamins - rest and relaxation - toxic substances A:
Ans: toxic substances

Ques: Q: What system in the human body makes white blood cells that protect the body from diseases? Choices: - cardiovascular system - renal system - reproductive system - lymphatic system A:
Ans:
lymphatic system