Protists

The animal-like toolkit contained in these protists is so significant that some think these protists evolved from a metazoan. ❋ Unknown (2008)

The scientists will focus on marine viruses and other tiny life called protists and their roles in the food chain. ❋ Unknown (2008)

Organisms that live within the interstitial spaces of sea ice include microfauna such as protists, and larger organisms such as ciliates, nematodes, rotatorians, turbellarians, and copepods. ❋ Unknown (2009)

These protists have abouit 9200 genes, far less than the 25,000 seen in flies or humans. ❋ Unknown (2008)

His central argument - that the "technium" his word for the world of technology deserves to be regarded as the seventh kingdom of life, along with plants, protists and animals - is an ambitious one, but one thing that Kelly does not lack is ambition. ❋ William Rosen (2010)

This happened, according to her view, by either bacteria or protists engulfing other bacteria (endosymbiosis), or more recently, by multi-cellular organisms being infected by bacteria or viruses (symbiogenesis). ❋ Unknown (2008)

Oceanographers have discovered large protists (Gromia sphaerica) roaming the bottom of the ocean near the Bahamas, making tracks that look similar to certain fossil grooves. ❋ Unknown (2008)

Hundreds of thousands of plants, fungi, protists, fish, crustaceans, cephalopods, and prokaryotes made it through as well as the Ark animals. ❋ Unknown (2010)

Autotrophic protists are restricted to the upper sunlit portion of the seas and found in abundances of a thousand per ml for the small flagellates. ❋ Unknown (2009)

Larger autrophic protists such as diatoms and dinoflagellates typically occur in concentrations of about one cell per ml. ❋ Unknown (2009)

Besides these two large, common life-styles there are parasitic protists as well 'mixotrophic' protists. ❋ Unknown (2009)

Figure 2: Some examples of marine protists, all of which about 100 micrometers in diameter or length They fall within the size-category of the microplankton. ❋ Unknown (2009)

Mixotrophic protists use both photosynthesis from chloroplasts as well as feeding on pre-formed organic matter, often in the form of other protists. ❋ Unknown (2009)

In most coastal zones, protists form the bulk of the phytoplankton. ❋ Unknown (2009)

However, throughout most of the seas, protist primary producers are small flagellates (2-10 micrometers) and fed upon by other protists, typically ciliates (Fig B, C). ❋ Unknown (2009)

Among marine microbes, consumers of primary producers are those which feed on autotrophic prokaryotes or autotrophic protists. ❋ Unknown (2009)

Thus, the viruses which attack the autotrophic prokaryotes Synechococcus, the bacteria which absorb dissolved organic excreted by autotrophic protists such as diatoms and dinoflagellates, and the protists such as ciliates, radiolarians which feed on autotrophic protists are all consumers of primary production. ❋ Unknown (2009)