Lorna wants to know if the size of the cookie influences how long it takes to bake. She places different amounts of cookie dough on baking sheets and times how long it takes for the cookies to bake. What is the independent variable in her investigation?

answer >   yes we do, women; have three holes, urethral opening(pee hole, vagina, and the women pee/girls pee out of the urethra like the men do; only they have a single opening to pee/ejaculate.   (sorry if i'm too forward with this, but this is for a biology class, isn't it? )

hope that !         : )

its b. greenhouse gasses trap uv rays for heat so that the plants stay alive.