Compare the cycling of water and nutrients through an ecosystem to the cycling of blood in your cardiovascular system. What is the source of energy in each case? PLZ help

The chromosomal structure that limits the number of cell divisions of a cell is the the chromosomal structure that limits the number of cell divisions of a cell is the kinetochore telomere histones centromere

Diagram of the evolution of land plants?

Reactants undergo chemical reaction to form products. this chemical equation represents one such reaction. the coefficient for one of the reactants or products is incorrect. which part of the chemical equation is incorrect?