If We Were to Build a Model Measuring the Supply

question 12

Multiple Choice

If we were to build a model measuring the supply of corn, which of the following could be an example of an exogenous variable in the model?

• A)The price of corn
• B)The quantity supplied of corn
• C)The quantity of rain
• D)The demand for corn

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Definitions:

Guttation

The exudation of drops of water from the pores of plants, usually at the tips or edges of leaves, due to root pressure in a humid environment.

Transpiration

Transpiration is the process by which water vapor is lost from plants to the atmosphere, mainly through the stomata in leaves.

Root Pressure

The pressure in xylem sap that occurs as a result of the active absorption of mineral ions followed by the osmotic uptake of water into roots from the soil.

Dendrochronology

A method of dating that uses the annual rings of trees.