The proteins in the cell membrane allow substances to come or go based on their concentrations. This is an important part of which maintains the immediate conditions necessary for life. a. osmosis
b. metabolism
c. homeostasis
d. endocytosis

Iknow #2 is d. i just need to know why

Of the groups of elements below, which are most likely to gain electrons to become anions? a. alkali metal b. boron group c. halogen d. transition metal

City a and city b had two different temperatures on a particular day. on that day, four times the temperature of city a was 8â° c more than 3 times the temperature of city b. the temperature of city a minus twice the temperature of city b was â’3â° c. what was the temperature of city a and city b on that day? city a was 5â° c, and city b was 4â° c. city a was 3â° c, and city b was â’1â° c. city a was 8â° c, and city b was â’3â° c. city a was 5â° c, and city b was â’5â° c.