Unit Test — Cumulative exam Answers

Which is like armor for the cell?

Oil is a powerful source of energy used for cars, machines, and many other purposes. While studying sources of energy that could replace the use of oil, a student thinks about solar power, wind power, nuclear power, and electric batteries. The students asks,"Which type of source will waste the least energy and provide the most energy in all situations?"Which best describes why a scientist would ask a different question than this one?

Which are characteristics of the integumentary system? Select two options.Skin’s outer layer has living cells.Hair helps regulate temperature.Oil glands produce sweat and oil.Nails protect nerves.Hair stays on the head for two months.

The three main types of scientific investigations are descriptive, comparative, and experimental. Which components are included in all three types of investigations?a scientific questionan independent variablea dependent variablea procedurea control groupa conclusion

Which image represents the step in mitosis when chromosomes condense and spindle fibers form?