What Is the Relationship of Overgrazing to Desertification

question 44

Multiple Choice

What is the relationship of overgrazing to desertification?

• A)Overgrazing is the destruction of a grassland ecosystem; desertification is the destruction of a desert ecosystem.
• B)Overgrazing results in barren exposed soil; if erosion continues, it contributes to desertification.
• C)Overgrazing is brought about by livestock operations; desertification is brought about by crop cultivation.
• D)Overgrazing and desertification are both a result of the introduction of non-native species coupled with extended droughts.

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Definitions:

Sodium Ions

Positively charged atoms of sodium, essential for cellular functions, including the generation and transmission of nerve impulses and the regulation of fluid balance in the body.

Neurotransmitters

Chemical substances in the body that help in transmitting signals across a synapse from one neuron to another.

Synaptic Cleft

A narrow gap between the terminal end of a neuron and the neighbouring neuron or cell, across which neurotransmitters are released for communication.

Passive Diffusion

The movement of substances across a cell membrane without the need for energy input, from an area of higher concentration to an area of lower concentration.