Dictionary » S » Sessile




(1) Of, pertaining to, or relating to the state of sessility or the inability to move actively or spontaneously.

(2) Of, or pertaining to being permanently attached to the substrate or to the base, hence, not freely moving.

(3) (botany) Of, or pertaining to the lack of petiole or leafstalk in some plants.


Word origin: Neo-Latin sessilis, sitting


Related forms: sessility (noun)

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Locomotory Evolution

... head out of the soil)the organis is able to react more quickly. Radially symmetrical bodies are much slower although they tend to be better for sessile organisms which dont have to move such as sponges, corals, echinoderms etc.

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by Youngji
Sun Feb 01, 2015 12:36 pm
Forum: Evolution
Topic: Locomotory Evolution
Replies: 1
Views: 1540

Yeast Mating Type Switching

... PART B: (b) A similar kind of cell asymmetry seems to occur during cell division in the bacterium, Caulobacter crescentus, in which a sessile (stalked) mother cell and a motile (flagellated) daughter cell are generated at the end of the cell cycle: diagram: http://i214.photobucket.com/albums/cc35/nirav464/partB.png ...

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by niravana21
Wed May 04, 2011 9:17 am
Forum: Cell Biology
Topic: Yeast Mating Type Switching
Replies: 3
Views: 7096

Re: Why Cnidaria swim?

There are many different forms of cnidaria, ranging from sessile corals to mobile jellyfish. The main reason for their mobile forms (including the medusa stage of anthozoans) is dispersal. Sometimes they swim towards the light for other reasons. There ...

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by skeptic
Wed Mar 24, 2010 8:41 pm
Forum: Zoology Discussion
Topic: Why Cnidaria swim?
Replies: 4
Views: 3641

How are plantae protists and stramenopila (diatom) different

... Most diatoms are unicellular and some are colonial algae, live in water, both heterotroph and autotroph, yellow brown chloroplast, they are sessile (don't have flagella however move by water stream as they float), reproduce by cell division. they are not considered to be plants because they ...

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by yahman
Fri Jan 22, 2010 5:26 pm
Forum: Microbiology
Topic: plantae protist and diatoms evolution
Replies: 3
Views: 13718

New Find in Antarctica

... few weeks back, but did you guys hear about the new find in Antarctica? Pink eelpouts were found, types of sea spiders and these glass tulip like sessile species. I do not remember the exact species names and great details, but it is on the web if you just search "Antarctica species finding" ...

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by Darwin420
Thu Mar 06, 2008 7:28 pm
Forum: Zoology Discussion
Topic: New Find in Antarctica
Replies: 6
Views: 3971
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