Discretionary calories are the extra amount of energy a person can consume after meeting all essential needs through eating nutrient-dense foods.
true / false.

Answer is true.

Explanation:

That calories that remain when the amount of nutrients required by the body are met is the discretionary calories.

These calories are good and essential because they are useful to the body when it is in need of calories, usually after exercise or rigorous work.

They are derived from foods that are rich in fat, such as cheese, milk, yoghurt etc.

white blood cells or wbc s are mainly 2 types-

1.agranulocytes

2.granulocytes

the monocytes or macrophages of agranulocytes , dendritic cells which are accessory leucocytes, and b cells which is one type of lymphocytes   identify the antigens present on the pathogen's surface. these three cells are called antigen presenting cells(apc) which are phagocytes and destroy the antigens by secreting antitoxins. besides this leukocyte is always plays vital role in the immunity of the body.

both male and female gametes are produced by meiosis of the germ cells. therefore, both male and female gametes are haploid. one male and one female gamete unite during the fertilization to form the diploid zygote. in seed bearing plants, pollen grain is the male gametophyte, which produces sperm cells.