Why are dark green vegetables such as kale and spinach good sources of vitamin A?
A) They contain abundant beta-carotene, a precursor of retinol.
B) They contain the most abundant preformed vitamin A.
C) They contain vitamin C precursors of retinol.
D) They are fortified with vitamin A.
Question 2
A group of fat-soluble plant pigments that are the basis for the orange, red, and deep-yellow
colors of many fruits and vegetables are called
A) prooxidants. B) carotenoids. C) provitamins. D) chlorophylls.
A molecular nanorobot dubbed a "spider" and labeled with green dyes traverses a substrate
Pathway for vitamin D activation and action
To help make good electrical contact with the terminals without doing any harm, select the ...
Kneeling on one knee to keep good alignment when massaging the arms and hands.
The Green Revolution and Conventional Irrigation
A Well of Sources for Bottled Water