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Sponges

Sponge

1. (Science: zoology) Any one of numerous species of spongiae, or porifera.

2. The elastic fibrous skeleton of many species of horny spongiae (keratosa), used for many purposes, especially the varieties of the genus spongia. The most valuable sponges are found in the Mediterranean and the red sea, and on the coasts of Florida and the west Indies.

3. One who lives upon others; a pertinaceous and indolent dependent; a parasite; a sponger.

4. Any spongelike substance. Specifically: Dough before it is kneaded and formed into loaves, and after it is converted into a light, spongy mass by the agency of the yeast or leaven.

iron from the puddling furnace, in a pasty condition.

iron ore, in masses, reduced but not melted or worked.

5. A mop for cleaning the bore of a cannon after a discharge. It consists of a cylinder of wood, covered with sheepskin with the wool on, or cloth with a heavy looped nap, and having a handle, or staff.

6. (Science: veterinary) The extremity, or point, of a horseshoe, answering to the heel. Bath sponge, any one of several varieties of coarse commercial sponges, especially spongia equina. Cup sponge, a toilet sponge growing in a cup-shaped form. Glass sponge. See glass-sponge, in the vocabulary. Glove sponge, a variety of commercial sponge (spongia officinalis, varie baa ty tubulufera), having very fine fibres, native of Florida, and the west Indies. Grass sponge, any one of several varieties of coarse commercial sponges having the surface irregularly tufted, as spongia graminea, and s. Equina, variety cerebriformis, of Florida and the west Indies. Horse sponge, a coarse commercial sponge, especially spongia equina. Platinum sponge.

(Science: chemistry) A metallic lead brought to a spongy form by reduction of lead salts, or by compressing finely divided lead; used in secondary batteries and otherwise.

(Science: botany) sponge tree see loof. Velvet sponge, a fine, soft commercial sponge (spongia equina, variety meandriniformis) found in Florida and the west Indies. Vitreous sponge. See glass-sponge. Yellow sponge, a common and valuable commercial sponge (spongia agaricina, variety corlosia) found in Florida and the west Indies.

Origin: OF. Esponge, f. Eponge, L. Spongia, gr, . Cf. Fungus, spunk.


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miRNA-mediated competing endogenous RNAs (ceRNAs) networks

... a large class of animal RNAs with regulatory potency. Nature. 2013 Mar 21;495(7441):333-8. 7. Natural RNA circles function as efficient microRNA sponges.Nature. 2013 Mar 21;495(7441):384-8. 8. Endogenous miRNA sponge lincRNA-RoR regulates Oct4, Nanog, and Sox2 in human embryonic stem cell self-renewal. ...

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by rnaworld2110
Sun Dec 15, 2013 9:29 am
 
Forum: Cell Biology
Topic: miRNA-mediated competing endogenous RNAs (ceRNAs) networks
Replies: 2
Views: 2991

Re: Why must we avert the genome of Eden?

... genome with more individual genes than an average bird, but the most stunning part is that they posses genes that shouldn't be in their genome. Sponges don't have a nervous system, yet they have many of the genes which required for building synapses (sodium channels). Again, this makes absolutely ...

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by wildfunguy
Fri Oct 04, 2013 7:49 pm
 
Forum: Evolution
Topic: Why must we avert the genome of Eden?
Replies: 6
Views: 7131

Why must we avert the genome of Eden?

... genome with more individual genes than an average bird, but the most stunning part is that they posses genes that shouldn't be in their genome. Sponges don't have a nervous system, yet they have many of the genes which required for building synapses (sodium channels). Again, this makes absolutely ...

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by Hunor
Mon Sep 23, 2013 12:08 am
 
Forum: Evolution
Topic: Why must we avert the genome of Eden?
Replies: 6
Views: 7131

Re: Nervous system of filter feeders or hunt for food phyla

The question makes no sense - there are filter feeders in just about every phylum, but (and I may be forgetting a really small phylum) only the sponges are exclusively filter feeders.

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by Darby
Sat Feb 04, 2012 11:09 pm
 
Forum: General Discussion
Topic: Nervous system of filter feeders or hunt for food phyla
Replies: 2
Views: 1266

How did collective animals evolve genetically?

A number of animals such as ants, jellyfish, sponges, slime mold slugs and even we humans are multicellular colonies or live as social groups. Is that explained through genetic evolution? How?

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by charles brough
Mon Oct 03, 2011 2:25 pm
 
Forum: Evolution
Topic: How did collective animals evolve genetically?
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Views: 5692
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