Answer to Question 1ANS: D
Phosphorus is also used to carry energy within the cell. Phosphorus enters the ocean via rivers and
precipitation in organic form when organisms die. It then converts to phosphate for further use.
Information can be found in the section Elements Cycle between Living Organisms and Their
Surroundings
Answer to Question 2ANS: C
Energy gets transformed into chemical energy by chlorophyll in primary producers. The primary
produces are then able to use that energy to make sugars for food. Other animals obtain this food and
energy by consumption. Information can be found in the section The Flow of Energy through Living
Things Allows Them to Maintain Complex Organization
20 common amino acids
The fate of carbon in the citric acid cycle
Pathway for synthesis of polyunsaturated fatty acids (PUFAs) in plants and animals
Carbon Isotope ratio
Carbon dioxide (~390ppm)
Common Sources of Carbon Monoxide