Earth's biodiversity remains a reservoir for ________.
A) water and waste production by humans
B) pests and disease
C) habitat extinction and species destruction
D) foods and medicines
E) oil and coal
Question 2
When examining the Keeling Curve in the accompanying graph, one notices a zigzag upward-moving curve. What do these small up and down movements indicate?
A) weather-related factors affecting CO2
B) seasonal cycles in CO2 concentrations
C) O2 versus CO2 concentrations
D) latitudinal differences in CO2 concentrations
E) uncertainty in the CO2 conditions
A diversity of species live within the soils, the ecology of which remains to be explored.
Oceanic circulation, which is driven mainly by the prevailing winds, moderates earth's climate.
Water-bottle
Water Hole
Layers of Earth
Production of colorless sectors and reversion of the unstable colorless