Mastodawn

Please watch my newest #animated #YouTube #video about the #Cambrianexplosion
https://youtu.be/EhUQfMcxUGs?si=5PALKW_J5fkkxOV6

It was a very #shortperiod in Earth's history, began ca. 541 million years ago and lasted only ~13-25 million years, during which giant #evolutionary leaps occurred in #animals. I.a.under influence of increased #oxygen levels, #Bilateria, primeval #Protostomia and #Deuterostomia evolved. We Tetrapoda much later derived from the latter.
©#StefanFWirth 2025

#Pics
©S F.Wirth,#AIassisted own work

katch wreck Jun 15, 2025

`By generating localized Chordin sources in the Chordin morphant background, we showed that mobile Chordin is necessary and sufficient to establish a peak of BMP signaling opposite to Chordin source. These results provide evidence for BMP shuttling in a bilaterally symmetric cnidarian and suggest that BMP shuttling may have been functional in the potentially bilaterally symmetric cnidarian-bilaterian ancestor.`

https://www.science.org/doi/10.1126/sciadv.adu6347

#evolution #zoology #cnidaria #bilateria

GenomeBiolEvol May 27, 2025

Abalde & Jondelius characterize opsins and phototransduction genes in Xenacoelomorpha, identifying cnidarian-like and lineage-specific opsins.

🔗 doi.org/10.1093/gbe/evaf078

#genome #evolution #bilateria

CellBioNews Apr 15, 2024

#Evolution's recipe book: How '#copy_paste' #errors led to insect flight, octopus camouflage and human cognition.

##gene_expression #transcriptomics #bilateria

https://phys.org/news/2024-04-evolution-recipe-errors-insect-flight.html

Evolution's recipe book: How 'copy paste' errors led to insect flight, octopus camouflage and human cognition

Seven hundred million years ago, a remarkable creature emerged for the first time. Though it may not have been much to look at by today's standards, the animal had a front and a back, a top and a bottom. This was a groundbreaking adaptation at the time, and one which laid down the basic body plan which most complex animals, including humans, would eventually inherit.

Phys.org

Charrvein Nov 28, 2023

Exam period is upon us

Today #diversityofLife for 1st year

Best question, describe and contrast #sponge and #bilateria #anatomy n #bodyplan

Tomorrow #HumanGenetics for 3rd year
#UniversityIceland

Pic from #GusGus concert

Ben Timberlake Mar 22, 2023

📃Do chicks prefer odd behavior in others? Variability in front-back orientation during movement is more attractive and might indicate the appeal of behavioral unpredictability, a hallmark of living things, report Orsola Rosa Salva, Elena Lorenzi & Giorgio Vallortigara of the Animal Brain Cognition group in Animal Cognition #bilateria
https://rdcu.be/c7W0W

Naïve chicks do not prefer objects with stable body orientation, though they may prefer behavioural variability

katch wreck Mar 3, 2023

"Together, our findings suggest that the temporal decoupling of head and trunk formation, as maximally observed in head larvae, facilitated larval evolution in Bilateria. This diverges from prevailing scenarios that propose either co-option or innovation of gene regulatory programmes to explain larva and adult origins"
https://www.nature.com/articles/s41586-022-05636-7#:~:text=Together%2C%20our%20findings,and%20adult%20origins

#bilateria #bilateralSymmetry #symmetry #animalEvolution #evolution #annelids #developmentalBiology #devbio #genetics #transcriptomics #epigenetics

Annelid functional genomics reveal the origins of bilaterian life cycles - Nature

Comparative chromosome-scale genome sequencing and transcriptomic and epigenomic profiling of three different species of annelid provide insight into the evolutionary origin of larvae.

Nature