1. Which of the following is NOT a characteristic common to all living organisms?
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A. Organization
B. Ability to respond to stimuli dt dt dt dt
C. Ability to fly dt dt
D. Reproduction
Answer: C
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2. What is the smallest structural and functional unit of an organism?
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A. Atom
B. Molecule
C. Cell
D. Tissue dt
Answer: C dt
3. Biology is best defined as: dt dt dt dt
A. The study of human behavior
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B. The study of living organisms and their environments
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C. The study of plants only
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D. The study of chemical reactions
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Answer: B dt
4. Which level of organization comes immediately after molecules?
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A. Atoms
B. Cells
C. Tissues
D. Organs
Answer: B
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5. True or False: Bacteria are multicellular organisms.
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Answer: False dt
6. What is a tissue? dt dt dt
A. A single cell
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B. A group of similar cells that perform a particular function
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C. A collection of different organs
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D. An entire organism
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Answer: B dt
7. The brain and spinal cord are examples of which level of organization?
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A. Tissue
B. Organ
,C. Organ system dt
D. Organism
Answer: C
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8. All members of one species in a particular area belong to a:
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A. Community
B. Population
C. Ecosystem
D. Biosphere
Answer: B
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9. True or False: The biosphere includes all of Earth's ecosystems collectively. A
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nswer: True dt
10. What is energy defined as? dt dt dt dt
A. The capacity to do work
dt dt dt dt
B. A type of molecule
dt dt dt
C. A living organism
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D. A chemical reaction
dt dt dt
Answer: A dt
11. Which process do plants use to convert solar energy into chemical energy?
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A. Respiration
B. Photosynthesis
C. Metabolism
D. Homeostasis
Answer: B
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12. Metabolism is: dt
A. The death of an organism
dt dt dt dt
B. The sum of all chemical reactions in a cell or organism
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C. A type of reproduction
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D. A form of energy
dt dt dt dt
Answer: B dt
13. True or False: Humans acquire energy by eating food. A
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nswer: True dt
14. What is the ultimate source of energy for most life on Earth?
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A. The moon dt
B. The sun dt
C. Wind
D. Water dt
Answer: B dt
15. Homeostasis refers to: dt dt
, A. Growth and development dt dt
B. Maintaining a constant internal environment dt dt dt dt
C. Reproduction
D. Evolution
Answer: B
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16. Normal human body temperature typically ranges between:
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A. 20-25°C
B. 30-35°C
C. 36.5-37.5°C
D. 40-45°C
Answer: C dt
17. True or False: The digestive system plays no role in maintaining homeostasis. A
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nswer: False
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18. Which systems work together to maintain body temperature?
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A. Cardiovascular and nervous systems dt dt dt
B. Only the skeletal system
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C. Only the respiratory system
dt dt dt
D. None of the above
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Answer: A dt
19. Response to stimuli in humans often involves: dt dt dt dt dt dt
A. Movement
B. Complete stillness dt
C. Sleep
D. Reproduction
Answer: A
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20. True or False: Plants can respond to external stimuli. A
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nswer: True
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21. DNA stands for:
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A. Deoxyribonitrogen acid dt
B. Deoxyribonucleic acid dt
C. Dinitrogen acid dt
D. Double nucleus acid dt dt dt
Answer: B dt
22. Genes are: dt
A. Large organismsdt
B. Short sequences of hereditary material
dt dt dt dt
C. Types of cells dt dt
D. Energy molecules dt