USABO Basics
Human Body Systems
Anatomy & Physiology Basics
Plant Basics
100

The first level of the exam

What is open exam?

100

This body system includes the neurons, brain, action potentials.

What is the nervous system?

100

This encases the human brain (bone name)

What is the skull?

100
Most plants are this color because of chlorophyll.
What is green?
200
The top ___ people advance to semifinals.

What is "10%"?


200

This body system includes immune responses, lines of defense, diseases.

What is the immune system?

200

This is the control center for your body.

What is the brain?

200

This part of the plant performs photosynthesis.

What are leaves/chloroplasts?

300

The final level of USABO

What is IBO (international biology olympiad)?


300

This body system includes the heart, blood and arteries.

What is cardiovascular/circulatory system?

300

These transmit deoxygenated blood towards the lungs, and are often shown as blue in color.

What are veins?

300

Plants need ____ to generate energy.

What is sunlight/light/sun?

400

These grade levels can take the USABO.

What are 9th, 10th, 11th, and 12th graders?

400

This body system includes hormones, glands, and signaling.

What is the endocrine system?

400

This is the nerve that transmits signals from your eye to your brain & helps you see.

What is the optic nerve?
400

This is the lowest part of the plant and absorbs water from the soil.

What are the roots?

500

About this many people took the USABO in 2017

What is 7,500-8,000?

500

This body system includes meiosis, egg/blastula formation & stem cell differentiation.

What is the reproductive system?

500

This is the longest bone in your body (or location). 

What is the femur (thigh bone)?

500

Plants make up ___% of the total USABO exam.

What is 15%?

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