What evolutionary role might blood antigens ABO and Rh have played in species/sub-species differentiation. Presence of a different blood type in a fetus can cause a build up of antigens that can prevent future pregnancies of different blood types. This most likely is an unfortunate by-product of...

My cousin has been renting a house for about 3 years. When she signed the first 6months lease it had an "ok" to keep her dogs. The owner passed away about a year ago. The new owners (the original owners daughter and son n law) were asked by my cousin if she could have the pool, and they said yes....

Hi, I'm replacing the liner on my 16x32 inground pool, it has metal walls and cement bottom, some of the cement has eroded and I would like to patch it, what kind of cement is used and do I need to treat existing cement before new cement will adhere? I live in Ontario Canada, which freezes during...

I have a 3 year old male cat who is fixed, I have had him since he was a kitten. Well, about 1 week ago he saw a stray cat in our garage.. he just saw her and got VERY angry, and since then he has attacked me twice. He only tries to attack me.. not my boyfriend, just me. And when he attacks me its...