You Are Studying an Ecosystem on Your Campus

question 16

Multiple Choice

You are studying an ecosystem on your campus. After a solid base of carefully observed and described facts, your next step would be to ____.

• A) make more observations
• B) make a hypothesis
• C) share your data with others
• D) wait for instructions
• E) design an experiment

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Definitions:

Mitral Valve

A valve in the heart located between the left atrium and left ventricle; it prevents the backflow of blood into the atrium.

Aortic Valve

A valve in the heart between the left ventricle and the aorta that prevents blood from flowing back into the heart.

Conducting System

A network of specialized cardiac muscle cells responsible for initiating and distributing the electrical impulses that stimulate heart contraction.

AV Valve

The atrioventricular (AV) valve regulates blood flow from the atria to the ventricles in the heart.