The difference between the photosynthetic production of carbohydrates and the respiration loss of carbohydrates is known as
A) net primary productivity. B) compensation point.
C) free air CO2 enrichment. D) net photosynthesis.
D
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What is the Ekman spiral?
A) The movement of water in the same direction as the wind above B) The decreasingly slower movement of water as it gets further away from the wind source C) The sum of all water directions in wind affected layers D) The friction created on the ocean's surface layer from wind
The period during which a deciduous tree is inactive and has lost its leaves is known as the ____________________ stage
Fill in the blank(s) with correct word
From this graph, one should conclude that
A. most of the energy input into the system goes toward changing temperature not changing state. B. most of the energy input into the system goes toward changing state, not to change temperature. C. none of these options are correct. D. most of the energy input into the system goes toward a more ordered, rigid, molecular structure.
In some areas, groundwater withdrawals are not being naturally recharged. This has led some to consider groundwater to be a ________ resource
A) variable B) nonrenewable C) renewable D) perpetual E) luxury