Soils High in Organic Matter Commonly Hold More Available Water

question 16

Multiple Choice

Soils high in organic matter commonly hold more available water than comparable soils with lower organic matter levels.This is most likely due to what characteristics of the high O.M.soils

• A)larger micro pore space
• B)lower permanent wilting percentage
• C)higher field capacity
• D)higher capacity of the O.M.to hold water tightly
• E)higher clay content

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Definitions:

Glutamate

An amino acid that functions as the major excitatory neurotransmitter in the vertebrate brain

All-Or-None Response

The principle that no variation exists in the strength of a single action potential; only a stimulus strong enough to depolarize the membrane to its critical threshold level results in transmission of an action potential.

Depolarized

A state in which the membrane potential of a neuron is less negative compared to the resting potential, easing the initiation of an action potential.

THC

Tetrahydrocannabinol, the principal psychoactive constituent of cannabis that affects the brain and alters mood or consciousness.