These two Science courses are not offered as individual college courses at Penn foster. The two Science courses that are offered as electives in our Vet Tech Associate's Degree are Intro to Biology and Essentials of Psychology. As you are already enrolled in the course, you will not have to worry about choosing these classes. They are already assigned to you. You took Intro to Bio in semester 1, and Psychology will be covered in semester 3. I hope this helps you, please let me know if you have any other questions.