13. Think of a concept that might be easier to understand or explain by making a model. Identify the concept, and explain why a model would be useful.

What is a gene ? a) a section of a protein that codes for dna. b) the alternate version of a trait. c) the visible trait in the f1 generation. d) a section of dna that codes for a specific trait .

What is the surface temperature of the ocean where hurricanes form? greater than 80 celsius approximately 27 celsius at least 76 celsius less than 10.5 celsius

Human genes only differ by less than percent. a. 1 b. 6 c. 11 d. 16