Giraffe Characteristics. The giraffe is the tallest living animal which is instantly recognizable by its exceptionally long neck. Adult males stand 15 â 19 feet (4.6 â 6.0 metres) tall, whereas females are shorter at 13 â 16 feet (4 â 4.8 metres) tall.
Bacterioplankton are bacteria and archaea, which play an important role in remineralising organic material down the water column (note that many phytoplankton are also bacterioplankton). Plankton are found throughout the oceans, seas and lakes of Earth.
the aggregate of organisms that inhabit continental and marine bodies of water and that drift under the influence of currents. Plankton consists of both plantsâphytoplankton (including bacterioplankton)âand animalsâzooplankton.It is distinguished from organisms found on the bottom, or benthos, and from free-swimming organisms, or nekton.lankton. see marine biology marine biology,study of ocean plants and animals and their ecological relationships. Marine organisms may be classified (according to their mode of life) as nektonic, planktonic, or benthic. Nektonic animals are those that swim and migrate freely, e.g......