What are the two types of anaerobic respiration? Describe the two in one paragraph.

The zone, which exists from a depth of 0 to 600 feet, is home to the majority of ocean life.

How can a geological time scale best be reconstructed? a) comparing vestigial structures in living species b) comparing homologous structures in living species c) examining homologous structures in fossil remains d) examining the written records of scientists from past cultures

Which of the following is not a possible effectof increasimg carbon dioxide levels in the atmosphere ?