Two lizards with different coloring exist within the same ecosystem. One lives in the trees, and the other prefers hiding among rocks. They are separate species because they behave differently
Othey have different characteristics
Othey cannot successfully reproduce
Othey exist within the same ecosystem

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.

unicellular organisms, like bacteria, are able to perform all life functions within one single cell. multicellular organisms need many different types of cells to carry out the same life processes. each of these special types of cells has a different structure that it perform a specific function.