the plains serve as a major producer of livestock and crops. The Native American tribes and herds of bison that originally inhabited the plains were displaced in the nineteenth century through a concerted effort by the United States to settle the Great Plains and expand the nation's agriculture.
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Answer:
Solon (in 594 BC), Cleisthenes (in 508/7 BC), and Ephialtes (in 462 BC) contributed to the development of Athenian democracy. Cleisthenes broke up the power of the nobility by organizing citizens into ten groups based on where they lived, rather than on their wealth. The longest-lasting democratic leader was Pericles.
Answer:
correct answer is option a and d
Environment-
Definition: The surroundings or conditions in which a person, animal, or plant lives or operates.
Synonym: Domain
Sentence: The environment of a desert scorpion is dry and hot.
Adaptation-
Definition: A change or the process of change by which an organism or species becomes better suited to its environment.
Synonym: Reconstruction
Sentence: Animals use adaptation to survive longer in other areas.
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Answer:
The three key hallmarks of science are:
- Science progresses through careful application of what is called the scientific method.
- Science progresses through the creation and testing of models of nature that explain the observations as simply as possible.
- Models must make testable predictions that will force us to revise or abandon the model if they do not agree with observations.