Which of the following is the best example of a scientific model? the polar bear habitat at the zoo a student created jello model of a plant cell a turtle terrarium in a pet store a computer simulation of projected algae growth in a pond

What molecules will be best used to compare different species with the exact same sequence of amino acids? why would two species have the same protein even if the molecules in question is different? (hint: transcription to translation to protein).

What molecule contains an organisms genetic material, passed down from parents to their offspring

Veins have a much lower blood pressure than arteries. which of these prevents backflow of blood in veins? a. pressure applied by the heart b. one–way valves in veins c. thin muscular walls of veins