Dark skin is found in populations near the equator. why? a. it prevent rickets. b. it protects from the damaging effects of uv radiation on folate. c. it increases the chance of heat evaporation. d. it protects from frostbite. e. it increases the skin’s exposure to ultraviolet radiation.

Abanana can be an excellent source of potassium in our diet. there is a naturally occurring, long-lived, radioactive isotope of potassium, 40-19k, which has a natural abundance of 0.0117% and a half-life 1.27 billion years. estimate the activity of a typical banana due to this potassium isotope assuming that most of the mass is in stable potassium.

Enzo sits with a small group of friends at lunch. lately, he has been very quiet and stays home a lot even though his friends invite him to go places. he likes to play video games in his free time and is slightly overweight. which behavior is a sign that enzo may need professional mental health treatment? a) being overweight b) playing video games c) withdrawing from activities d) having a small group of friends

Whats the difference between epinephrine and norepinephrine?