(Q).
Answer the following question given this paragraph: CHAPTER SUMMARY 4.1 Studying Cells A cell is the smallest unit of life. Most cells are so tiny that they cannot be seen with the naked eye. Therefore, scientists use microscopes to study cells. Electron microscopes provide higher magnification, higher resolution, and more detail than. Q: What is considered the smallest unit of life? Choices: - proteins - particle - molecule - cell A:
(A).
cell

(Q).
Answer the following question given this paragraph: The lungs release carbon dioxide into the air. Carbon dioxide is a gaseous waste product of the cells. Wastes are excreted from the body by the excretory system. Therefore, the lungs are organs of the excretory system as well as the respiratory system. Q: Are the lungs organs of the excretory system, the respiratory system, or both? Choices: - excretory - respiratory - neither - both A:
(A).
both

(Q).
Answer the following question given this paragraph: An n-type (negative-type) semiconductor consists of silicon and an element such as phosphorus that gives the silicon crystal extra electrons. You can see this in the Figure above . An n-type semiconductor is like the negative terminal of a battery. Q: Silicon with an element that gives it extra electrons is which type of semiconductor? Choices: - m. Type - i.g - type - k. - type - n-type A:
(A).
n-type