<span>The closer you are to the poles of the Earth, the fewer ecological niches for species to fill. </span>
Answer:
xylem
Explanation:
xylem
The vascular system of plants has two transport tissues, called xylem and phloem. Xylem transports water and minerals, while phloem transports a variety of dissolved substances, including sugars and amino acids, throughout the plant.
Explanation:
Carbohydrates are the main energy source of the human diet.
Fats are also a source of energy but fats are the slowest source of energy.
