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Algae

Definition

noun, singular: alga

A group of aquatic, photosynthetic, eukaryotic organisms ranging from unicellular to multicellular forms, and generally possess chlorophyll but lack true roots, stems and leaves characteristic of terrestrial plants.


Supplement

In five kingdom scheme of classification, the algae, together with the protozoa, belong to Kingdom Protista. They are distinct from the protozoa by being photosynthetic. The algae are further grouped into various phyla: Euglenophyta (euglenids), Chrysophyta (diatoms), Pyrrophyta (dinoflaggelates), Chlorophyta (green algae), Phaeophyta (brown algae), and Rhodophyta (red algae). The Cyanophyta or blue-green algae, which are prokaryotic organisms, are traditionally included in this group but in modern classification, they are now grouped together with bacteria under Kingdom Monera.


Word origin: Latin alga, meaning seaweed.
Related forms: algal (adjective)
Synonym: seaweed
Compare: blue-green algae.
See also: phycology, algaculture, diatom, kelp, laminaria, nori.


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Aquatic life in the polar regions

Would sunlight penetrate through the thick layer of ice for the growth of algae?

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by josem
Sat Aug 30, 2014 7:25 pm
 
Forum: Ecology
Topic: Aquatic life in the polar regions
Replies: 2
Views: 276

Multicellular prokaryote

Is unicellar means gather nutrients and reproduce independently? Is filamentous algae uni or multicellular? Which is the margin between uni and multicellularity?

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by josem
Tue Jul 22, 2014 8:45 pm
 
Forum: Microbiology
Topic: Multicellular prokaryote
Replies: 26
Views: 26374

Re:

... with a human face"? "Savage capitalism" is now everywhere and getting rid of the "useless eaters" as though they were algae, slime molds and bacteria. Even ex-KGB Lieut. Col. V. Putin is playing that infamous game now. Hail Pussy Riot!!! I thank you in advance. WTF?

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by JackBean
Mon Mar 03, 2014 1:11 pm
 
Forum: Molecular Biology
Topic: Newbie question about the first life
Replies: 14
Views: 9424

Newbie question about the first life

... with a human face"? "Savage capitalism" is now everywhere and getting rid of the "useless eaters" as though they were algae, slime molds and bacteria. Even ex-KGB Lieut. Col. V. Putin is playing that infamous game now. Hail Pussy Riot!!! I thank you in advance. The ...

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by piscilactovegetarian
Sat Mar 01, 2014 12:28 pm
 
Forum: Molecular Biology
Topic: Newbie question about the first life
Replies: 14
Views: 9424

Newbie question about the first life

... Kingdom). Shortly after I graduated from high school in 1969, biologist Lynn Margulis's five-kingdom system replaced the two-kingdom system. Now algae and fungi are no longer "plants". The five kingdoms: Animal, Plant, Fungi, Protoctista (algae and slime molds, and not to be confused ...

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by piscilactovegetarian
Fri Feb 28, 2014 12:10 am
 
Forum: Molecular Biology
Topic: Newbie question about the first life
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