- 1. According to the cell theory, cells are the _____.
A) same in plants and animals
B) basic units of life
C) smallest particles on Earth
D) largest parts of the body
- 2. A substance called glucose provides energy for _____.
A) large animals only
B) all living things
C) animals only
D) plants only
- 3. The skin and the heart are two kinds of
A) organ systems
B) organs
C) cells
D) tissues
- 4. Proteins are assembled at organelles called _____.
A) mitochondria
B) vacuoles
C) ribosomes
D) chloroplasts
- 5. People rely on photosynthesis in plants for food and ____.
A) chlorophyll
B) oxygen
C) carbon dioxide
D) minerals
- 6. Vascular tissues are important for the _____.
A) diffusion of water
B) absorption of energy
C) opening of the stomata
D) transport of materials
- 7. To make food, plants use energy from sunlight to combine water and _____.
A) minerals
B) sugar
C) carbon dioxide
D) oxygen
- 8. A plant cell in a nonvascular plant gets water from _____.
A) root pressure
B) diffusion
C) gravity
D) cohesion
- 9. How many chambers are in the human heart _____.
A) 2
B) 3
C) 4
D) 5
- 10. In the lungs, gas exchange occurs in tiny air sacs called _____.
A) villi
B) bronchi
C) trachea
D) alveoli
- 11. Saliva works to break down starch into_____.
A) fats
B) proteins
C) vitamins
D) sugars
- 12. Where are your kidneys located?
A) between the heart and lungs
B) behind the stomach
C) near the middle of the back
D) next to the liver
- 13. What is the main purpose of the Circulatory System?
- 14. What is the main purpose of the Respiratory System?
- 15. What is the main purpose of the Digestive System?
- 16. What is the main purpose of the Excretory System?
|