An example of a typical pioneer species, that is one that appears in the earliest stages of ecological succession, is

a. weeds.
b. spider.
c. oak tree.
d. humans.

there really is life in the deepest part

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.