Carbon is important to living things because A) it is abundant on the earth’s surface.
B) it metabolizes easily, creating a quick energy source.
C) it has twelve protons and nuetrons.
D) it can form four covalent bonds with other atoms

20 the compound al(nh3)2 has atoms of nitrogen.

Amarine ecologist has constructed the conceptual model shown in the diagram. what predictions can be made from using this model? where the tertiary consumers get their energy how often primary producers are able to reproduce when bacteria and fungi initiate the process of decomposition whether other secondary consumers are present

When are the centromeres broken in meiosis?