Cheatgrass Has Been Able to Invade Dry,temperate Grasslands and the Arid,shrub-Dominated

question 27

Multiple Choice

Cheatgrass has been able to invade dry,temperate grasslands and the arid,shrub-dominated habitats (sage-steppe) of North America.Which of the following is NOT a reason for this?

• A)Cheatgrass is an annual,so there are seeds in the ground ready to grow any year.
• B)Cheatgrass is somewhat fire tolerant.
• C)Cheatgrass promotes fire frequency and increases fire intensity.
• D)Cheatgrass competes successfully with bunchgrasses for water and nutrients.
• E)All of the above are valid reasons.

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Correlation Coefficients

A statistical measure that indicates the extent to which two or more variables fluctuate together, ranging from -1 to 1 where 1 means a perfect positive correlation and -1 means a perfect negative correlation.

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Correlation Coefficients

Correlation coefficients are statistical measures that quantify the degree to which two variables move in relation to each other, indicating the strength and direction of their relationship.