Calcium
Calcium helps build and maintain bones.
Active transport requires energy because it moves molecules across a membrane to a region of lower to higher concentration which is often against their concentration gradient or has an obstructing factor.
Answer:
2. It carries water from the roots to the leaves.
Explanation:
Phloem is the vascular tissue in charge of transporting and distributing organic nutrients.
Because the earth is in an angle so the northern hemisphere receives more heat and vice versa
A.
Sound absorption depends more on the thickness of a material than its color.
