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
Daily changes in photosynthesis and nitrogen fixation gene expression in Synechococcus cultures isol
Changes in Earth's atmospheric carbon dioxide levels over geological time.
The nitrogen cycle. Numbers represent fluxes as 1012 g N per year (data from Schlesinger 1991, after
The two skills of the element Evaluation
Visualization of nucleic acids and proteins in electrophoresis gels
Carnivorous plants of the genus Nepenthes grow in nitrogen-poor soil