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Explanation

Vertebrate is an animal of a large group distinguished by the possession of a backbone or spinal column, including mammals, birds, reptiles, amphibians, and fishes.

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Coefficient is a number used to multiply a variable.

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A question should be asked to whole class.

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Post-writing activities help students polish their work. 

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What Is an Effectively Managed Classroom-An effectively managed classroom is one that runs smoothly, with minimal confusion and downtime, and maximizes opportunities for student learning.

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Pulley is a wheel with a grooved rim around which a cord passes, which acts to change the direction of a force applied to the cord and is used to raise heavy weights.

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Relationship between teachers and students should be strong for batter education.

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 Jacobabad in Pakistan as the hottest place on Earth

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German Inventor Karl von Drais invent bicycle.

His machine, known as the "swiftwalker," hit the road in 1817.