The red blood cell does not have a nucleus. The lack of nucleus enables the rbc to have more room to contain hemoglobin which increases it's efficiency to carrying oxygen
it's (+/-) 90 degrees. in total it's 180 but the equator is at zero and the two hemispheres have 90 each
Unsure of the page number, but.. The word, “aloof” in the book, “Mice and Men”, can be found on chapter 4.