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
American Water Spaniel
Pathway of urine production and elimination.
Water Molecules
Depleted ground water
Tardigrade wasn't correct, nor was Gastrotricha. What on earth is this asking me.
Water strider (Gerris remigis) on water surface, showing surface tension.