5) The troposphere of the Earth's atmosphere supports life because it contains A. Water, oxygen, carbon dioxide, other greenhouse gases
B. Water, nitrogen, helium, and argon
C. Water, oxygen, carbon monoxide, methane
D. Water, nitrogen, oxygen, carbon monoxide

How many trophic levels are there in the following food chain? phytoplankton - shrimp - perch - pike - osprey

Astudent drew the following flowchart to show the movement of nutrients. soil → roots → plants →? where does nitrogen go next? a. directly into nearby animals as nutrition b. directly into aquifers through condensation c. directly into the air through evaporation d. directly into nearby plants during fixation

Which element forms the basis of all organic organisms a carbon b oxygen c hydrogen d nitrogen