Difference Between A Marsh, A Swamp, A Bog, And A Fen. In A Nutshell. The worldâs wetlands are ecosystems in themselves, and are defined by the flora and fauna they support. Marshes are nutrient-rich wetlands that support a variety of reeds and grasses, while swamps are defined by their ability to support woody plants and trees. Bogs are characterized by their poor soil and high peat content, while fens have less peat and more plant life than a bog.
Many adult Labradors will sleep for well over half of every 24 hours, and puppies under four months old may sleep as much as 20 hours a day.
REM Sleep after approximately 6 hours of sleep. EEG waveforms of brain activity during sleep showing the individual is almost in REM sleep, a fact that is obvious when looking at both the EEG and fMRI scan, but it can also been seen in this small section which identifies a scan used in laboratory testing.