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