Select your answer:
Topics:
Knee Anatomy Respiration Anatomy and Physiology Molecular Biology Skeletal System Vocabulary Medical Careers Movement and Locomotion Dyslexia Hormones Diseases Key Terms Mechanical Digestion Muscle Anatomy Diagnostic Tools Types of Immunity The Cell Mutation & Genetic EngineeringOther quiz:
Ecology › ViewWhich occurrence represents an example of evolution?
A. Exposure to radiation reduces the rate of mutation in leaf cells.
B. A mutation in a liver cell causes a person to produce an enzyme that is less efficient.
C. Cells in a zygote eventually change into bone cells or skin cells
D. Some antibiotics are almost useless, because pathogens have developed a resistance to these antibiotics.
Human Body Systems › View
As your body works harder, what happens to your HEART rate?
A. increases
B. decreases
C. stays the same
D. beats backwards