Answer:
negative feedback helping to maintain homeostasis
Explanation:
Oxygen atoms in a water molecule are partially negative, so the sodium ions (Na+) should be drawn to them... vice versa, the Hydrogen in a water molecule is partially positive... which should interact with the negatively charged chlorine (Cl-) ion.
True
Crossing over involves homologous chromosome pairs "crossing over" and exchanging genetic information.
I have attached an image that might help you understand the concept a bit better.
I hope this helps! I'm happy to answer any other questions you might have :)
[Image sourced from: http://www.qsstudy.com/biology/define-crossing-importance]