Vascular plants exhibit alternation of generation. what is alternation of generation?
a. the plant exhibits reduced sporophyte and dominant gametophyte alternately.
b. plant cells undergo mitosis and meiosis alternately.
c. the plant exists as a diploid organism, and at other times as a haploid

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.

stimulus is a change in the environment that causes an organism to react. the response is the reaction to the stimulus. some examples of stimuli for zebras are drought, to many predators, and bad feeding grounds such as dead grass or plants. zebras respond to stimuli just like all other living organisms