We should remember that we should consume all necessary nutrients at a correct amount and proportion. this includes the primary food substance carbohydrates, fat and protein. and protective food substance in a small amount, which includes mineral ions ( iron, calcium etc) and vitamins. Also we have to take in enough water (6-8 cups a day) and fibre to prevent deficient diseases and to maintain health.
in addition, note that the amount of food intake varies with age, sex, body status, daily activity etc. For example, teenagers and pregnant women should increase all necessary nutrients intake to ensure proper growth and development of ourselves or the baby.
B) antigen, should be your answer
T cell, antibody, and histamine are all created by your body to help combat wounds or foreign substances
hope this helps
I believe your answer is B :)
Analogous structures have different evolutionary ancestries but have the same function. some types of structures are the wings of birds, bats and insects. Homologous structures are the opposite, they have similar ancestries and common traits but not the same function.
