Which key nutrient has been known to reduce the risk for heart disease for all adults over the age of 51?

a. calcium

b. vitamin d

c. vitamin c

d. vitamin b12

When deciding to become a parent: a. the only thing that matters is the desire to have a child. b. the most important thing is whether or not you are financially ready. c. you should be ready to support and nurture a child. d. you have no choice; "nature" decides if and when you will have a child.

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.

Which of the following can be effective in preventing the onset of viral infection in humans? a) taking vitaminsb) getting vaccinatedc) taking antibioticsd) taking drugs that inhibit transcription