The first species to colonize a barren area is a Pioneer Species
Answer:
<u>proteins.</u>
Explanation:
The DNA code contains instructions needed to make the proteins and molecules essential for our growth, development and health.
<span>In theory, to gain a pound of body weight per
week, one must consume an additional 1,000 calories per day. An approximate
3,500 calories is equivalent to a pound of body weight. If a person
continuously consumes more than 3,500 calories over a period of time it is
expected that this person will gain 1 pound of weight. <span>
<span>Nutritionists
usually suggest that an
underweight person should add between 500-1,000 calories per day to encourage a
1-2 pound increase in body weight. Because being underweight sacrifices one's
immunity and overall health.</span></span></span>
The cell requires a barrier between itself and its environment.
