Which period represents the last 2 million years of geologic time? O Devonian
O Cambrian
O Quaternary
O Tertiary

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

Crossing over is a method of (blank)?

Which of these is one of the nitrogenous bases in dna? a. proline b. leucine c. glycine d. thymine