Questions about natural selection

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

How are viruses different from eukaryotic cells?

Everything in the universe originated from a single point. how was it possible for everything in the universe to have occupied a single point in space?