Ques: Q: What are typically arranged into complex tubular networks with extensive surface areas? Choices: - alveoli - hair follicles - Golgi apparatus - transport epithelia A:
Ans: transport epithelia

Ques: Q: What are the earliest and simplest vertebrates? Choices: - whales - birds - bears - fish A:
Ans: fish

Ques: Q: Three distinct layers or tunics form the walls of what structures; the first is a smooth, inner lining of endothelial cells in contact with the red blood cells? Choices: - lungs - white blood cells - alveoli - blood vessels A:
Ans: blood vessels

Ques: Q: In what organ does pepsin help break down proteins? Choices: - kidney - liver - skin - stomach A:
Ans:
stomach