#eukaryotes

[theperfectquestion]

A new discovery of an organelle was reported in 2023:

https://www.nature.com/articles/d41586-023-01518-8

I think most most people underestimate the complexity of a single eukaryotic cell.

[wikipediapictures]

Ramaria araiospora

“A fruitbody of the coral fungus Ramaria araiospora Marr & D.E. Stuntz. Photographed in Jackson Demonstration State Forest, Mendocino Co., California, USA.” - via Wikimedia Commons

[myxomycota]

Ceratiomyxa fruticulosa var. arbuscula by Eric Cho

‘arbuscula’ means shrub-like !

[dystopianroach]

[100x Magnification]

inspected some more deceased Daphnia underneath the microscope today, and saw this little hungry bastard - around 10-20 μm in length and actively eating the carcass and little tidbits around it. I'm thinking it's some kind of rotifer? but its sooo small. baby rotifer? I could watch these little things for hours. Look at his little "tails"!

EDIT: someone pointed out that I accidentally called this little guy unicellular! I was writing a lab report about unicellular organisms while making this post - I meant to say if not a rotifer maybe a unicellular eukaryote. Maybe don’t do three to four things at once and write a tumblr post at the same time

[apsciencebylyn]

STENTORS 😍

There were literally millions of these little single-celled cones in a tiny pond. They looked vaguely familiar but I couldn't place them, until I remembered I had seen them in a Journey to the Microcosmos video: https://youtu.be/PZoaKzEXzi8?si=UJcSJc8B844mj5KA

[lampthegloomyone]

Not art, but this is my first time ever looking at protists under my microscope so i am pretty happy about it

[katborg82]

Prototaxites loganii, a mysterious tree-like multicellular terrestrial eukaryote, towers above the primitive moss-like land plants that covered the ground during the Devonian period. (~419-358 Mya)

[thewandererh]

(turn down your volume)

played Everything today. i first played it when i was around 10 and i couldn’t figure out the controls. coming back to all the philosophy i didn’t remember has been so enlightening. completely recommend!

[dougdimmadodo]

A Shelled Amoeba (Arcella vulgaris)

Family: Arcella Family (Arcellidae)

IUCN Conservation Status: Unassessed

The otherwise soft, squishy single-celled body of this common amoeba is enclosed in a concave brownish-yellow hemispherical shell known as a test, which is made up of chiton (the same material that forms the exoskeletons of insects) and protects it from both predators and adverse environmental conditions. Found in stagnant freshwater and damp soil throughout much of the world, a single hole in the shells of members of this species allows them to extend long, flexible "false feet" known as pseudopods out into their environment, which they use both to catch and ingest food (mainly algae and other smaller motile protists) and to drag themselves along surfaces, although when in water they are also capable of floating along by filling a bladder-like vacuole in their main cell body with gas. Like almost all single-celled organisms Arcella vulgaris reproduces asexually through binary fission (with a single adult cell dividing in two to produce "daughters". "Newborn" members of this species may initially lack shells, and if the shells of adults are too badly damaged they have been found to be capable of crawling out and surviving without protection for short periods as they grow a new one.

-----------------------------------------------------------------

Image Source: Here

Already included above, but a very cool little shell study: Here

[a-dinosaur-a-day]

ID: a “tree of life” diagram showing bacteria, archaea, and eukaryota as well as their “roots”(which actually look like roots, and the times genes were transferred between different groups (including plastids and mitochondria)

End ID

show the birds aren’t dinos people this diagram i think they’ll explode

Oh horizontal gene transfer

[snototter]

Red raspberry slime mold (Tubifera ferruginosa) in Burke County, North Carolina, USA

by Jim Petranka

[wikipediapictures]

Tompot blenny

“Parablennius gattorugine” - via Wikimedia Commons

[myxomycota]

Ceratiomyxa fruticulosa var. porioides

by Brent Haglund

[er-cryptid]

RNA Polymerases in Eukaryotes

-- Eukaryotes have three forms of RNA polymerase -> RNAP I -> RNAP II -> RNAP III

-- each form transcribes a different type of gene

RNAP I -> product is rRNA -> located in the nucleolus

RNAP II -> products -- mRNA -- snRNA -> located in the nucleoplasm

RNAP III -> products -- 5S rRNA -- tRNA -> located in the nucleoplasm

.

Patreon

[bactetheria]

I wonder if I'm a strain that can make yogurts.