6. Which of the following is NOT example of an organ?

a. brain
b. heart
c. liver
d. nails
7. Which of the following does not belong to the group?
a. stomach
b. lungs
c. intestines
d. pancreas
8. Which of the following does not belong to the group?
a. brain
b. bronchi
c. lungs
d. trachea
9. Which of the following is a population?
a. mountain stream
b. frogs in a fond
c. hawks,barred owls, and eagles on Davao
d. lizards and snakes in a barn
10. Which of the following examples is correctly matched with its level of organization?
a. A monarch butterfly is an organ system
b. A liver is a type of cell
c. The brain is a type of tissue
d. The skin is an organ
11. Justin has learned that the brain,spinal cord, and peripheral nerves work together. What do they combine to form?
a. a cell
b. tissue
c. organ
d. organ systems​