Earth changes all the time, making it a <u>dynamic </u>planet.
I think in real life because you get to see how they act and i have been on three trips i know that this is not related but I've been to Egypt and Italy and china and i am in 7th grade so ya. I think seeing animals and things in real life is the best thing to do overall.
I would assume because of where san francisco is i suppose that it just depends on where your located at
Isotonic Solutions are the best for animal cells
