What allows the human body to distinguish between estrogen and testosterone?

answer; /// i believe the correct answer is (thrombocytopenia); (a)

1. efficient use of space

2. elimination of groundwater contamination

3. energy generation

4. lower carbon footprint

50% lit on the left side

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 !         : )