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What are segments of dna that code for a particular trait. a combination of dna and proteins make up what

James is trying to prove newton's 2nd law of motion. he tries to move four different objects with different masses, shapes, and sizes from point a to point b. the objects are a toy car, a car, a refrigerator, and a kitchen table. after some experimentation, he finds that force is dependent on the mass of the object, rather than it's size or shape. the object that takes the most force to move is the

If the chemical properties of a substance remain unchanged and appearance or shape of a substance changes it is called a ?