A testosterone level test measures the amount of testosterone in the blood and is reported as nanograms per deciliter (ng/dL). It's also known as a serum testosterone test. - Google
6CO2 + 6H2O + light energy = C6H12O6 + 6O2.
-So the end products are glucose (C6H1206) and 6 oxygen molecules (6O2)
They should all start with sunlight. The 2nd one, sunlight, grass, zebras, lions is the right answer.
