Which Factor Most Likely Prevented the Grasslands at the Eastern

question 9

Multiple Choice

Which factor most likely prevented the grasslands at the eastern edge of the Great Plains from becoming forest?

• A) Insufficient precipitation
• B) Frequent fires set by humans
• C) Excessively low temperatures
• D) Insufficient soil nutrients

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Definitions:

Identical Twins

Siblings who are genetically identical to each other because they were conceived from the same egg and sperm, and hence share all of their genes.

Fraternal Twins

Twins who are born at the same time but developed from two different eggs fertilized by two different sperm, resulting in genetically distinct siblings.

Genetics

The study of genes, genetic variation, and heredity in living organisms, and how these affect physical and behavioral traits.

Personality

A unique set of emotional, thought, and behavioral patterns that define an individual’s personal style of interacting with the environment and other people.