Q: The human body is composed of different systems made of specialized cells, tissues, and organs. Each of these structures has a specific function that aids in the survival of the human species. Which organs are used in reproduction? OPTIONS:
- brain, spinal cord, and eyes
- lungs, esophagus, and heart
- mouth, stomach, and gallbladder
- ovaries, uterus, and fallopian tubes
A: ovaries, uterus, and fallopian tubes

Q: In one of the steps of the carbon cycle, a person exhales a molecule of carbon dioxide (CO2) into the atmosphere. Which of the following is most likely to happen next to the atom of carbon in this molecule? OPTIONS:
- It may be used as part of a sugar in a plant.
- It may become part of a protein in an animal.
- It may be consumed as a fossil fuel is burned.
- It may be decomposed into carbon and oxygen by a bacterium.
A: It may be used as part of a sugar in a plant.

Q: In the human body the digestion of proteins takes place primarily in which two organs? OPTIONS:
- Mouth and stomach
- Stomach and small intestine
- Liver and gall bladder
- Pancreas and large intestine
A: Stomach and small intestine

Q: Which of the following is a characteristic of all chemical changes? OPTIONS:
- A different state of matter is produced.
- Some mass is converted to energy.
- Some form of light is given off.
- A new material is formed.
A:
A new material is formed.