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.

answer: accepted answer: aquatic animals use the oxygen dissolved in water to carry out respiration. since the amount of dissolved oxygen in water is low as compared to the amount of oxygen in the air, therefore the rate of breathing in aquatic animals is much faster than it is in terrestrial animals.

explanation:

not sure if this is what you'r looking for eubacteria and archaebacteria