What is the difference between the two polynomials (9x^2+8x)-(2x^2+3x)

Match the examples to the correct level of organization. 1. system level roses, snakes, puppies 2. organism level roots, stamens, leaves 3. tissue level bone, cartilage, blood 4. organ level heart, veins, arteries

Give examples of selective advantage of organism’s body part/organ

Is this mrna or rna need need the answer in a hurry