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noun, singular: organism

Living things that are capable of reacting to stimuli, reproduction, growth, and homeostasis.


Plants, animals, fungi and microorganisms are examples of organisms. They all consist of monomeric units called cells. Some organisms may function independently or singly (unicellular) whereas others may form many units (multicellular) divided into specialized tissues and organs. Based on cell type, organisms may be divided into prokaryotes and eukaryotes.

Word origin: Greek - organismos, from Ancient Greek organon , meaning "organ, instrument, tool".
Related forms: organismal (adjective), organismic (adjective), organismically (adverb)
See also: superorganism, microorganism.

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Isogamous organisms

... in matching-type regions, like the positive + and negative - mathing types in some algaes), and with a sexual reproduction. In isogamous organisms we have a small genetic differentiation between the gametes, as the + and - one I said. Is there an organism like this in nature? Also, is ...

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by jaumzaum
Thu Oct 02, 2014 11:47 pm
Forum: General Discussion
Topic: Isogamous organisms
Replies: 0
Views: 28

Re: Science vs. Science Fiction, non-scientist needs help

... How "intelligent" would they be? This is the major concern that I have. The sole objective of most *unicellular* organisms (such as bacteria) is to grow as fast as possible. This allows organisms to outcompete the slower growing ones eventually. It is difficult ...

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by sosippus
Wed Sep 24, 2014 8:16 pm
Forum: Microbiology
Topic: Science vs. Science Fiction, non-scientist needs help
Replies: 2
Views: 780


... top, microaerophile in middle and anerobic at bottom. It will work well with culturable bacteria. I am not sure will it work with eukaryotic microorganisms or not. This is a cool idea. However, this doesn't help me either. I am looking for information already known, and I would like to have specific ...

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by sosippus
Wed Sep 24, 2014 7:44 pm
Forum: Microbiology
Topic: Oxygen requirements of eukaryotes
Replies: 3
Views: 339

Help with the basic understanding of Ecosystems

... But the distinction between an environment and an ecosystem is the fact that when you refer to an ecosystem you're talking about the habitat, the organisms that live there AND how they interact and affect each other. For example, in a forest ecosystem, the soil fertility influences what plants ...

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by BasicBiology
Wed Sep 24, 2014 8:06 am
Forum: Ecology
Topic: Help with the basic understanding of Ecosystems
Replies: 1
Views: 454

Multicellular prokaryote

... ample opportunity to develop into multicellular versions of themselves. There should be something in the fossil record to show that multicellular organisms composed of different tissues and organs existed during the eons time when there were only prokaryotes around - nothing found so far that ...

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by Scotsgofree
Fri Sep 19, 2014 7:54 pm
Forum: Microbiology
Topic: Multicellular prokaryote
Replies: 27
Views: 27980
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