5 the three major parts of the circulatory system are

5. The three major parts of the circulatory system are the heart, the blood
vessels, and the blood. The heart is an organ made up of specialized cells.
Which emergent property is observed only in the heart as an organ?
A. Pumping blood
B. Energy utilization
C. ATP generation
D. Muscle contraction
D 6. The diagram on the right depicts the concept of
____.
7. A scientific approach to explaining some aspect of
the natural world includes all of the following EXCEPT

B. faith-based views
C. testing
D. systematic observations
D 8. A controlled experiment should have all the
following features EXCEPT
9. A factor that can change in an experiment is called a ____.
A. conclusion
B. variable
C. hypothesis
D. control group
C 10. A biologist in a laboratory reports a new discovery based on
experimental results. If the experimental results are valid; biologists in other
laboratories should be able to