Aplants root system is which level or organization? a. cell b. organ c. organ system d. tissue

C. Organ system. The root system, which supports the plants and absorbs water and minerals, is usually underground. Example plant organ systems : The shoot system of a plant consists of leaves, stems, flowers, and fruits.

image result for how many calories of energy will 20 grams of carbohydrates provide in one gram provides 4 calories

consuming the right balance of protein, carbohydrates and fat can you maintain a healthy weight and optimize your energy levels. protein and carbohydrates both contain 4 calories per gram, while fat provides 9 calories per gram.

•there must be variation for the particular trait within a population.

•the variation must be inheritable (that is, it must be capable of being passed on from the parents to their offspring).

•individuals with one version of the trait must produce more offspring than those with a different version of the trait.good

explanation: