MICRONUTRIENTS

Question 1

vitamins

Answer 1

organic compounds (carbon skeletons)
can be lipid or water-soluble
perform a variety of functions: 
- metabolic regulation 
- coenzymes
- antioxidants
May or may not be considered 'essential'

Question 2

Vitamin A

Answer 2

essential for felids, marine birds and most carnivorous animals

Question 3

Vitamin D

Answer 3

Essential for amphibians, birds and reptiles

only required in mammalian diets for those with insufficient sun exposure

Question 4

minerals

Answer 4

inorganic compounds

all are essential