[ 3 / biz / cgl / ck / diy / fa / ic / jp / lit / sci / vr / vt ] [ index / top / reports ] [ become a patron ] [ status ]
2023-11: Warosu is now out of extended maintenance.

/sci/ - Science & Math

View post   

File: 198 KB, 1411x833, spiders.jpg [View same] [iqdb] [saucenao] [google]
16023285 No.16023285 [Reply] [Original]

is insect a case of gene loss? originally same genes as humans but they lost like 30% of the genes and became more simplified creatures, then somehow copying these remaining genes further and futher evolving them and becoming very succesfull in their own niches

first there was ancestor of fish, somekind of weird worm which wasnt yet segmented

then it gave birth to octopus

after octopus (and snails) had separated from the original worm, the worm changed into a segmented type

then the segmented worm evolved into fish (pieces of fish vertebrae are the segments)

on the other hand the worm also evolved into insect ancestors some 700 million years ago, we would be talking about ocean creatures as insects themselves start on land and were never in the sea

centipedes are very segmented, each segment is kinda like a piece of human vertebrae. on the other hand insects have less segments, only the head, middle body and abdomen so you can think of them being two pieces of vertebrae

however in insects the segmentation continues in their legs as well

only centipedes, insects and spiders have so called arthropod legs, I am not entirely sure what part of human is corresponding to their legs, maybe lungs because in unsegmented worms the hairs that come out of them are the worms lungs and the hairs look like insects legs..

in terms of genes, insects are a succesfull case of "lost of genes"
they originally had all the genes a fish would have but they lost majority of it and became twisted into the form they are now, they dont contain an inner vertebrae but instead the vertebrae manifests itself as insect segmentation of the whole body

what continues to be same for fish and insect is a hollow notochord inside the creature (in fish its inside vertebrae, in insects its just stays there inside their body running from brain to anus, if a notochord is cut in half insect is paralyzed)

>> No.16023349

I think you should stop having ideas

>> No.16023363

nigga what are you jabbering about, my REAL nigga here figured out some kind of weird worm which wasnt yet segmented gave birth to an octopus! truly groundbreaking research.

>> No.16023458

This is the kind of babble you can get behind

>> No.16023459

no matter what, I will not eat ze bugs.
my intestines can't digest chitin, as 99.99% of humans do.

>> No.16023733

I hope you don’t eat mushrooms then

>> No.16023779

I dont.
A waste of money.

>> No.16023996

>a primate can't digest chitin
anon there are valid reasons to not eat ze boogs but chitin isn't one of them

>> No.16024010

What else are in ze boogs except chitin?
Bug intestine? Bug parasites?

>> No.16024023

Ectoplasm, yes, ectoplasm

>> No.16024032

No. I will not eat ze boogs intestine and parasites

>> No.16024035

Parasites are the big one. If chitin were poison every monkey, ape, shroomer and 3rd worlder would be dead

>> No.16024039

Chitin is not poison it just doesnt taste good and make my stomach churn when eating a significant amount.
It the worst food, doesnt do anything, just take space and energy away from your body.

>> No.16024471

You eat significant amounts of bugs?

>> No.16024534

human cannot digest chitin, it comes out as diarrhea

this is why humans turned into wheat based lifestyle 10 000 years ago

>> No.16024583

Maybe you have rooted the tree wrong?

>> No.16024624

no, thats the real mystery of it
its completely right

comparison is between whole mitochondrial genome between the mentioned organisms

the first bilaterian animal likely had a mitochondrion which was transmitted to all its descendants and some lineages it mutated more than in some others

mutation speed is determined by lifespan: human lives maybe about 20 years before reproducing, many arthropods live for 1 year altough long lived species also exist

this would indicate an insect genome mutates 20 times faster than a human but this is of course a quess

>> No.16025188

I ate spider hot pot once as a dare
wasn't a nice experience
I can only tell you I didn't eat anything for the next two days

>> No.16025205


>> No.16025207
File: 1.82 MB, 4032x3024, IMG_3210.jpg [View same] [iqdb] [saucenao] [google]

You are not even reading that tree correctly. Also mitochondrial gene evolution does not necessarily reflect other genes. And you are missing so many phyla representatives that this analysis is worthless. You need some echinoderms (closest invertebrate group), sponges, ctenophores (most distal animals), and actual INSECTS to make any kind of inference. Also, show nodal support values for this tree or it is fake and gay.

>> No.16025306

how big spiders

>> No.16025308

beroe forskalii is a ctenophore and you can clearly see its completely different from all other organisms in the tree

>> No.16025427

as big as my hand.
it actually had meat lmao.